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Tremco Willseal expansion joints are engineered to accommodate the natural movement of buildings and infrastructure while maintaining a secure, weathertight seal. These high-performance joint systems absorb expansion, contraction, seismic shifts, and other structural movements to prevent water infiltration, air leakage, and premature deterioration. Designed for both new construction and restoration projects, Tremco Willseal products offer solutions for a wide range of applications, including commercial buildings, transportation infrastructure, stadiums, and industrial facilities.
Built for durability and versatility, Tremco Willseal expansion joints are available in a variety of materials, including pre-compressed, acrylic-impregnated foam, pre-formed extrusions, and advanced polyurethane-methacrylate technology. These materials ensure superior movement capabilities, impact resistance, and long-term performance in demanding environments. Whether it’s a high-traffic parking deck, a fire-rated vertical joint, or a below-grade waterproofing application, Tremco Willseal provides industry-leading technology to protect structures from the elements and extend their lifespan.
Beyond structural integrity, these joint systems are designed to enhance building efficiency by improving thermal, acoustic, and air-sealing properties. Their ability to prevent moisture intrusion reduces the risk of mold, corrosion, and material degradation, contributing to a safer and more sustainable built environment. With proven reliability across decades of installations, Tremco Willseal expansion joints continue to set the standard for high-performance sealing solutions in the construction industry.
Tremco Willseal 250
Traffic-Grade Horizontal Expansion Joint Sealant
Tremco Willseal 250 is a pre-compressed, self-expanding polyurethane foam joint sealant engineered for high-performance horizontal applications. Infused with a hydrophobic acrylic polymer sealing compound and finished with a factory-applied silicone coating, Willseal 250 delivers a watertight, dust-proof, airtight, and thermally insulating seal. Its unique composition allows it to expand within the joint, eliminating the need for invasive anchoring while maintaining superior movement capabilities. Designed for demanding environments, this expansion joint sealant effectively withstands vehicular traffic, solvents, fuels, and extreme temperature fluctuations.
Use Cases & Advantages
Technical Specifications
Limitations & Storage
For joints wider than 3 inches, a cover plate is required for added support.
Should not be exposed to hydrocarbon solvents, solvent-based paints, or corrosive chemicals.
Substrates must be clean, dry, and free of oil or grease for optimal adhesion.
Not suitable for installation at temperatures below -14°F (-25°C) or above 95°F (35°C) without consulting Tremco technical support.
Store in a dry, enclosed area at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal 250-R
Reinforced Horizontal Expansion Joint Sealant
Tremco Willseal 250-R is a patent-protected expansion joint system engineered to handle high foot traffic and pedestrian load-bearing applications. It builds upon the proven performance of Willseal 250 by incorporating strategically positioned reinforcing members beneath the sealant face, providing enhanced stability and impact resistance. The system consists of a pre-compressed hydrophobic acrylic-impregnated foam core, a factory-applied highway-grade, fuel-resistant silicone coating, and an internal reinforcement layer to distribute surface loads effectively.
Designed for both interior and exterior horizontal joints, Willseal 250-R ensures long-term durability, accommodating structural movement while maintaining a watertight, dust-proof, airtight, and UV-stable seal. It expands upon installation without the need for invasive anchoring, making it an ideal choice for heavy-traffic environments.
Use Cases & Advantages
Willseal 250-R is built for high-traffic pedestrian and vehicular applications, delivering reliable joint stability in demanding environments. It is ideal for stadiums and arenas, where it withstands heavy pedestrian loads and prevents moisture intrusion, as well as parking garages, where it protects expansion joints from vehicle stress and environmental exposure. On plaza decks and skyways, it provides a stable, long-lasting seal, ensuring safe movement on elevated walkways and public spaces. In mall entrances and concourses, it accommodates continuous pedestrian flow, while in hospitals and medical facilities, its GREENGUARD Gold certification makes it safe for indoor environments with strict air quality requirements.
Designed for high-load areas, Willseal 250-R features internal reinforcement members that enhance stability and point load capacity under pedestrian and vehicle traffic. It accommodates ±50% movement (100% total) to prevent joint failure in dynamic structures, while its non-invasive anchoring system eliminates the need for mechanical fastening, streamlining installation. The factory-impregnated hydrophobic acrylic polymer and fuel-resistant silicone coating ensure long-term weather and chemical resistance, while its enhanced surface load transfer minimizes wear and extends service life. Available in Concrete Gray, Highway Gray, and Traffic-Grade Black, with custom color options available, Willseal 250-R delivers exceptional performance and durability in high-traffic environments.
Technical Specifications
Tremco Wilseal 250-R Datasheet
Limitations & Storage
Should not come into contact with hydrocarbon solvents, solvent-based paints, or corrosive chemicals.
Will not adhere to surfaces contaminated by oil or grease; concrete must be clean, dry, and structurally sound.
Installation not recommended below 40°F (4°C) without consulting Tremco technical support.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal 600
Breathable, Flexible Joint Seal for Vertical Applications
Tremco Willseal 250-R is a patent-protected expansion joint system engineered to handle high foot traffic and pedestrian load-bearing applications. It builds upon the proven performance of Willseal 250 by incorporating strategically positioned reinforcing members beneath the sealant face, providing enhanced stability and impact resistance. The system consists of a pre-compressed hydrophobic acrylic-impregnated foam core, a factory-applied highway-grade, fuel-resistant silicone coating, and an internal reinforcement layer to distribute surface loads effectively.
Designed for both interior and exterior horizontal joints, Willseal 250-R ensures long-term durability, accommodating structural movement while maintaining a watertight, dust-proof, airtight, and UV-stable seal. It expands upon installation without the need for invasive anchoring, making it an ideal choice for heavy-traffic environments.
Use Cases & Advantages
Willseal 600 is designed for vertical and exterior applications, providing a primary or secondary seal in projects requiring airtight, dust-proof, and weather-resistant protection. It accommodates structural movement in expansion, control, isolation, and retrofit joints while maintaining a continuous, durable seal. Ideal for pre-cast concrete, masonry, and brick facades, it prevents water and air infiltration in exterior wall systems. It also functions as a breathable barrier in roofing and insulated metal panels, making it a valuable component in building envelopes. Common applications include exterior insulation finish systems (EIFS), starter track assemblies for window walls, and interior vapor, dust, acoustical, and air control, where it enhances thermal efficiency and sound attenuation.
Engineered for flexibility and ease of installation, Willseal 600 maintains elasticity to accommodate joint movement, preventing cracking or separation over time. Delivered in a pre-compressed state, it self-expands to create a snug, watertight fit, requiring no mixing or priming, which simplifies installation and reduces labor costs. With high chemical compatibility, it is safe for use with galvanized steel, aluminum, concrete, wood, Plexiglass, and natural stone without the risk of corrosion or material degradation. Its excellent thermal resistance (R-values between 3.3 and 3.6) improves energy efficiency, while its proven performance against wind-driven rain ensures long-term durability in harsh weather conditions. Additionally, Willseal 600 is low in volatility and safe to handle, requiring only soap and water for cleanup.
Technical Specifications
Limitations & Storage
Not designed for below-grade applications or areas exposed to standing or ponding water.
Should not come into contact with hydrocarbon solvents or corrosive chemicals.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal FR-V
Fire-Rated Vertical Expansion Joint Seal
Tremco Willseal FR-V is a pre-compressed, fire-rated expansion joint seal engineered for vertical applications where fire protection, smoke containment, and waterproofing are critical. This advanced seal features a UV-stable, fire-retardant impregnated foam core with an integrated smoke barrier and a factory-applied sealant facer for added protection. Designed for use as a standalone fire-rated joint or behind expansion joint covers and plates, Willseal FR-V ensures superior fire resistance, acoustic performance, and joint movement accommodation while maintaining a durable, watertight seal.
Tested and certified under UL 2079 and CAN/ULC-S115, Willseal FR-V provides 2-hour and 3-hour fire ratings when installed according to a UL-tested firestop system. Its ability to withstand rapid movement and its non-invasive anchoring system make it a trusted choice for critical fire-rated construction applications.
Use Cases & Advantages
Willseal FR-V is designed for vertical fire-rated expansion joints, making it an ideal solution for new construction and retrofit projects requiring fire containment and structural flexibility. It provides a UL 2079-certified firestop solution for fire-rated construction joints, ensuring compliance with safety regulations while preventing fire, smoke, and moisture penetration. Its ability to accommodate movement in seismic and retrofit joints makes it well-suited for dynamic structures, while its use in vertical expansion, control, and isolation joints enhances building facade protection. Available in multiple Spectrem® color options, Willseal FR-V integrates seamlessly into architectural finishes, providing both performance and aesthetic flexibility.
With a 2-hour and 3-hour fire rating, Willseal FR-V meets UL 2079 (ASTM E1966) and CAN/ULC-S115 standards, ensuring high-performance fire containment. Its integrated smoke barrier prevents toxic gas and fume passage, while its STC rating of 54 and OITC rating of 48 significantly reduces sound transmission. Engineered for 100% joint movement capability (±50%), it accommodates structural shifts without compromising integrity. The factory-coated silicone finish ensures UV and moisture resistance, while the non-invasive anchoring system eliminates the need for mechanical fasteners, simplifying installation. Available in White, Precast White, Limestone, Charcoal, Bronze, and Black, with custom color options available, Willseal FR-V provides long-term durability, fire protection, and seamless integration into building designs.
Technical Specifications
Limitations & Storage
Not recommended for use in passive fire containment systems that are not listed or approved by Willseal.
Seal depth is typically 4 inches
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal FR SAF-V
Fire-Rated Vertical Expansion Joint Seal
Tremco Willseal FR/SAF-V is a pre-compressed, fire-rated expansion joint seal engineered for vertical applications requiring fire protection, smoke containment, and tamper resistance. This advanced joint system integrates a fire-retardant impregnated foam core with an integrated smoke barrier and a pick-resistant, factory-applied sealant facer. Unlike traditional fire-rated seals, Willseal FR/SAF-V does not require an intumescent sealant coating, simplifying installation while ensuring superior fire resistance, durability, and security.
Certified under UL 2079 (ASTM E1966) and CAN/ULC-S115, Willseal FR/SAF-V meets the most stringent fire protection standards, offering 2-hour and 3-hour fire ratings when installed according to UL-tested firestop systems. Its pick-resistant surface makes it ideal for high-security and public access areas, preventing tampering and unauthorized removal.
Use Cases & Advantages
Willseal FR/SAF-V is designed for fire-rated vertical expansion joints in environments that demand enhanced security and durability. It provides UL 2079-certified fire protection for fire-rated construction joints, ensuring compliance with strict fire safety regulations. Engineered to accommodate movement in seismic and retrofit joints, it maintains fire and smoke resistance while adapting to structural shifts. Its tamper-resistant design makes it ideal for hospitals, detention centers, schools, and other public buildings, where vandalism and unauthorized removal are concerns. Available in Tru White and Limestone, with custom color options available, it integrates seamlessly into architectural finishes while delivering long-term fire and moisture protection.
With 2-hour and 3-hour fire ratings, Willseal FR/SAF-V meets UL 2079 and CAN/ULC-S115 standards, ensuring maximum fire containment. Its factory-applied pick-resistant coating hardens to 50 ± 10 durometer, preventing tampering and damage in high-security environments. The integrated smoke barrier blocks toxic gases and fumes, while its 100% joint movement capability (±50%) ensures long-term flexibility in dynamic structures. With an STC rating of 54 and OITC rating of 48, it significantly reduces sound transmission, making it suitable for noise-sensitive environments. The waterproof and abrasion-resistant design protects against moisture, wear, and environmental exposure, while the non-invasive anchoring system eliminates the need for mechanical fasteners, simplifying installation.
Technical Specifications
Tremco Wilseal FR SAF-V Datasheet
Limitations & Storage
Not recommended for use in passive fire containment systems that are not listed or approved by Willseal.
Seal depth is typically 4 inches.
Avoid exposure to harsh chemicals; will not adhere to surfaces contaminated by oil or grease.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal FR-H
Fire-Rated Horizontal Expansion Joint Seal
Tremco Willseal FR-H is a pre-compressed, fire-rated expansion joint seal engineered for horizontal applications requiring fire protection, smoke containment, and traffic durability. Designed with a UV-stable, fire-retardant impregnated foam core, this advanced joint system features an integrated smoke barrier and a factory-applied, traffic-rated sealant facer for enhanced durability under vehicle and pedestrian loads.
Certified under UL 2079 (ASTM E1966) and CAN/ULC-S115, Willseal FR-H meets the most rigorous fire protection standards, offering 2-hour and 3-hour fire ratings when installed in accordance with a UL-tested firestop system. Its ability to withstand traffic loads, maintain watertight performance, and accommodate joint movement makes it a trusted choice for parking structures, stadiums, and high-performance construction projects.
Use Cases & Advantages
Willseal FR-H is designed for fire-rated horizontal expansion joints in areas exposed to vehicular and pedestrian traffic, providing fire containment and structural flexibility. It is ideal for parking garages, where it ensures fire protection and a watertight seal in dynamic expansion joints, and stadiums and arenas, where it withstands heavy foot traffic while maintaining fire and smoke containment. On plaza decks, it protects expansion joints from weather exposure and structural movement, while in airport runways and taxiways, it resists fuel exposure and dynamic traffic loads, preventing fire spread. Additionally, its use in ceiling joints ensures smoke-tight and fire-rated performance in interior applications.
Willseal FR-H meets UL 2079 and CAN/ULC-S115 standards, providing 2-hour and 3-hour fire ratings for maximum fire containment. Its integrated smoke barrier prevents toxic gas passage, while the factory-applied traffic-grade sealant coating enhances durability under constant loads. With 100% joint movement capability (±50%), it adapts to structural shifts without compromising performance. Its watertight and weather-resistant design prevents moisture intrusion and UV degradation, while its STC rating of 54 and OITC rating of 48 significantly reduces sound transmission in high-traffic environments. Available in Concrete Gray, Highway Gray, and Traffic-Grade Black, with custom color options available, Willseal FR-H provides long-lasting fire protection and structural reliability in demanding horizontal applications.
Technical Specifications
Limitations & Storage
Not recommended for use in passive fire containment systems that are not listed or approved by Willseal.
Seal depth is typically 4 inches.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Seismic
High-Movement Expansion Joint Seal
Tremco Willseal Seismic is a pre-compressed, self-expanding expansion joint seal designed to accommodate extreme movement conditions while maintaining a watertight, dust-proof, noise-reducing, and thermally insulating seal. Constructed from open micro-cell polyurethane foam impregnated with a hydrophobic acrylic polymer, it features a factory-applied silicone coating for enhanced durability and weather resistance.
This joint seal is engineered to handle seismic activity, structural movement, and dynamic environmental changes, making it ideal for applications requiring superior flexibility and durability. Willseal Seismic is available in a wide range of colors to match construction substrates, ensuring a seamless architectural finish while delivering long-term performance in demanding conditions.
Use Cases & Advantages
Willseal Seismic is designed for high-movement vertical expansion joints, providing enhanced flexibility and long-term protection in structures subject to dynamic movement. It effectively absorbs seismic shifts and structural adjustments, making it ideal for seismic and retrofit joints where maintaining a secure, watertight seal is critical. It prevents air, water, and noise infiltration in primary expansion, control, and isolation joints, ensuring building envelope integrity. Common applications include pre-cast concrete, masonry, and brick facades, where it offers long-lasting environmental protection, as well as curtainwalls and exterior panel systems, where it ensures consistent sealing in metal, granite, and EIFS-clad structures. Additionally, it is designed for vertical construction joints, particularly in exposed areas requiring color matching and architectural integration. For horizontal applications, Willseal Seismic HS is recommended.
Built for maximum movement accommodation, Willseal Seismic supports ±50% joint movement (100% total), ensuring seismic protection and durability. Its pre-compressed, one-step installation allows for quick, non-invasive placement without mechanical fasteners, reducing labor costs and simplifying application. The compression recovery technology ensures long-term joint integrity, withstanding repeated movement cycles without degradation. Its hydrophobic acrylic polymer and factory-applied silicone coating offer weatherproof and UV-resistant protection, preventing moisture damage and temperature-related wear. Available in Spectrem standard colors, including White, Limestone, Charcoal, Bronze, and Black, with custom options available, it blends seamlessly into architectural designs. With an STC rating of 54 and OITC rating of 48, it also provides high acoustic performance, reducing sound transmission in high-movement environments.
Technical Specifications
Tremco Wilseal Seismic Datasheet
Limitations & Storage
Not compatible with hydrocarbon solvents, solvent-based paints, or corrosive chemicals.
Will not adhere to oil- or grease-contaminated surfaces; ensure all substrates are clean, dry, and structurally sound.
Installation not recommended below -14°F (-25°C) or above 95°F (35°C) without consulting Tremco technical support.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Willseal Seismic-HS
High-Movement Horizontal Expansion Joint Seal
Tremco Willseal Seismic-HS is a pre-compressed, self-expanding expansion joint seal designed for horizontal applications requiring extreme movement capability while maintaining a watertight, dust-proof, noise-reducing, and thermally insulating seal. Made from open micro-cell polyurethane foam impregnated with a hydrophobic acrylic polymer, it features a factory-applied silicone coating for enhanced weather resistance and durability.
This joint seal is engineered to handle seismic activity, structural movement, and dynamic environmental changes, making it ideal for horizontal joints that are not exposed to vehicular traffic. With its non-invasive anchoring system, Willseal Seismic-HS ensures long-term performance with minimal installation
Use Cases & Advantages
Willseal Seismic-HS is engineered for non-trafficked horizontal expansion joints, providing flexibility and long-term protection in structures subject to dynamic movement. It is ideal for seismic and retrofit joints, where it absorbs extreme movement while maintaining a continuous seal. In primary construction joints, it prevents moisture, air, and noise infiltration, ensuring building envelope integrity. It also delivers a durable, weatherproof seal in pre-cast concrete floor-to-wall joints, protecting structural connections from environmental exposure. Additionally, it integrates seamlessly into exterior panel systems, including masonry, granite, metal, and curtainwall assemblies. For vertical applications, Willseal Seismic is recommended.
Designed to handle ±50% joint movement (100% total), Willseal Seismic-HS absorbs seismic shifts, expansion, and contraction, ensuring long-term flexibility. Its non-invasive anchoring system simplifies installation by eliminating the need for mechanical fasteners, while its compression recovery technology ensures the joint withstands repeated movement cycles without degradation. The hydrophobic acrylic polymer and factory-applied silicone coating provide weatherproof and UV-resistant protection, preventing moisture damage and deterioration. Available in Spectrem® standard colors, including White, Limestone, Charcoal, Bronze, and Black, with custom options available, it blends into architectural designs while offering high acoustic performance, with an STC rating of 54 and OITC rating of 48, reducing sound transmission in seismic and structural movement applications.
Technical Specifications
Tremco Wilseal Seismic HS Datasheet
Limitations & Storage
Not compatible with hydrocarbon solvents, solvent-based paints, or corrosive chemicals.
Will not adhere to oil- or grease-contaminated surfaces; ensure all substrates are clean, dry, and structurally sound.
Installation not recommended below -14°F (-25°C) or above 95°F (35°C) without consulting Tremco technical support.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Seismic SAF-V
Tamper-Resistant Vertical Expansion Joint Seal
Tremco Willseal Seismic SAF-V is a pre-compressed, self-expanding expansion joint seal designed for high-security vertical applications where tamper resistance, fire safety, and extreme movement capability are essential. Constructed from open micro-cell polyurethane foam impregnated with a hydrophobic acrylic polymer, it features a factory-applied pick-resistant sealant coating, making it ideal for institutional and public buildings prone to damage or vandalism.
This joint seal provides a watertight, dust-proof, noise-reducing, and thermally insulating barrier, ensuring long-term durability while maintaining architectural flexibility with custom color options. Engineered for use in seismic and retrofit applications, Willseal Seismic SAF-V absorbs building movement without mechanical anchoring, making it a trusted choice for high-security expansion joint protection.
Use Cases & Advantages
Willseal Seismic SAF-V is designed for vertical expansion joints in high-security environments, providing tamper resistance, seismic protection, and weather durability. It is ideal for correctional facilities and detention centers, where its pick-resistant, tamper-proof seal ensures secure containment. In schools and daycare centers, it delivers long-term durability in high-traffic, damage-prone areas, while in hospitals and healthcare facilities, it provides a secure, watertight seal for patient safety and infection control. Its application in government buildings meets strict safety standards, ensuring resistance to environmental exposure, while public transportation hubs, including train stations, airports, and transit centers, benefit from its vandal-resistant construction.
Engineered to handle ±50% joint movement (100% total), Willseal Seismic SAF-V absorbs seismic shifts, structural expansion, and contraction, maintaining long-term flexibility and protection. Its factory-applied, pick-resistant sealant coating hardens to 50 ± 10 durometer, preventing unauthorized removal or damage in secure locations. The non-invasive anchoring system eliminates the need for mechanical fasteners, simplifying installation while ensuring joint integrity. With a hydrophobic acrylic polymer and factory-applied elastomeric coating, it remains watertight and UV resistant, offering protection against moisture, temperature fluctuations, and environmental exposure. Available in Tru White and Limestone, with custom color options available, it also delivers high acoustic performance, with an STC rating of 54 and OITC rating of 47, reducing sound transmission in sensitive environments.
Technical Specifications
Tremco Wilseal Seismic SAF-V Datasheet
Limitations & Storage
Not compatible with harsh chemicals; avoid exposure to hydrocarbon solvents or corrosive materials.
Will not adhere to oil- or grease-contaminated surfaces; ensure all substrates are clean, dry, and structurally sound.
Installation not recommended below -40°F (-40°C) or above 95°F (35°C) without consulting Tremco technical support.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Coreseal
Flexible, Watertight Expansion Joint Seal
Tremco Willseal Coreseal is a preformed, closed-cell ethylene vinyl acetate (EVA) copolymer foam designed to deliver a watertight, dust-proof, airtight, and thermally insulating seal for expansion joints. Engineered to function as both a primary and secondary joint sealant, Coreseal offers high durability, UV resistance, and excellent movement accommodation without requiring mechanical anchoring.
This lightweight, compressible joint seal is ideal for horizontal and vertical applications, including highway infrastructure, parking garages, and bridge expansion joints, where a reliable and impermeable seal is critical. It meets all applicable compressible sealant standards and provides superior performance in extreme conditions.
Use Cases & Advantages
Willseal Coreseal is designed for horizontal and vertical expansion joints, providing superior movement capability and long-term environmental protection. It ensures a watertight seal in dynamic structures, making it ideal for primary expansion joints and control joints, where it prevents moisture and air infiltration in commercial and infrastructure projects. Its below-grade sealing capabilities offer long-lasting performance in subsurface applications, while its use in parking garage expansion joints protects against water ingress and thermal expansion/contraction. In bridge and highway expansion joints, it accommodates structural movement while withstanding road conditions and environmental exposure. Additionally, stadiums and plaza decks benefit from its durability in pedestrian and weather-exposed areas.
Willseal Coreseal provides exceptional water resistance, conforming to DIN 53428, with a maximum water absorption of only 1% after 7 days, ensuring an impermeable seal. Its lightweight, flexible construction allows for easy installation without mechanical anchoring, reducing labor and material costs. The seamless monolithic design eliminates the risk of delamination, maintaining consistent sealing performance over time. Engineered for excellent compression recovery, it withstands movement cycles without failure, while its UV and chemical resistance ensures long-term durability in exposed environments. Available in sizes from ½” to 10”, with custom sizing options available, Willseal Coreseal delivers versatile, high-performance joint sealing for demanding structural applications.
Technical Specifications
Tremco Wilseal Coreseal Datasheet
Limitations & Storage
Not intended for joints requiring ± 50% movement (100% total movement).
Not compatible with hot-applied waterproofing membranes.
Avoid contact with hydrocarbon solvents, solvent-based paints, and corrosive chemicals.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Color Coreseal V
Flexible, Watertight Vertical Expansion Joint Seal
Tremco Willseal Color Coreseal V is a preformed, closed-cell ethylene vinyl acetate (EVA) copolymer foam designed for vertical expansion joints that require a durable, watertight, and flexible seal. This lightweight, compressible joint system features a factory-applied colorized silicone skin, providing chemical and puncture resistance while maintaining a seamless architectural finish. Engineered for high movement conditions, it offers superior compression, tension, and shear performance, ensuring long-term protection in demanding environments.
With its monolithic construction, Willseal Color Coreseal V does not delaminate, making it a reliable primary sealant for exterior and interior vertical applications. The silicone skin enhances UV stability, moisture protection, and aesthetic flexibility, making it an ideal choice for exposed expansion joints in commercial and infrastructure projects.
Use Cases & Advantages
Willseal Color Coreseal V is designed for vertical expansion joints in high-performance applications, providing superior movement accommodation and long-term weatherproofing. It effectively prevents water, air, and noise infiltration in primary construction joints, ensuring building envelope integrity in commercial and industrial buildings. Engineered for structural flexibility, it accommodates vertical expansion, control, and isolation joints, maintaining a secure, watertight seal even under seismic and retrofit conditions. Its application in pre-cast concrete walls, tilt-up walls, and exterior panel systems ensures long-term durability, while its seamless integration in masonry, metal, granite, and EIFS applications makes it a versatile choice for curtain walls and exposed architectural finishes. Available in a wide range of factory-applied silicone colors, it blends with surrounding materials for a refined aesthetic.
Built for durability in exposed environments, Willseal Color Coreseal V is watertight, airtight, and UV resistant, maintaining long-term sealing performance. It accommodates ± 25% movement (50% total), ensuring flexibility in dynamic structures, while its pre-cured silicone skin provides chemical and puncture resistance for enhanced durability and appearance. The non-invasive anchoring system eliminates the need for mechanical fastening, reducing installation time and labor costs. Its seamless monolithic construction prevents delamination, ensuring consistent performance in demanding applications. Available in Spectrem standard colors, including White, Limestone, Charcoal, Bronze, and Black, with custom options available, Willseal Color Coreseal V offers high-performance joint sealing with customizable aesthetic integration.
Technical Specifications
Tremco Wilseal Coreseal V Datasheet
Limitations & Storage
Not designed for joints exceeding ± 25% movement (50% total).
Not suitable for submerged joints or applications involving constant water exposure.
Avoid contact with harsh chemicals unless a polysulfide finish sealant is applied.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Color Coreseal H
Flexible, Watertight Horizontal Expansion Joint Seal
Tremco Willseal Color Coreseal H is a preformed, closed-cell ethylene vinyl acetate (EVA) copolymer foam engineered for horizontal expansion joints requiring a durable, watertight, and flexible seal. This lightweight, compressible joint system features a traffic-rated, factory-applied colorized silicone skin, delivering chemical and puncture resistance while maintaining a seamless architectural finish. Designed for high-movement applications, Willseal Color Coreseal H offers exceptional compression, tension, and shear capabilities, ensuring long-term performance in demanding environments.
With its monolithic construction, Willseal Color Coreseal H does not delaminate, making it a reliable primary joint sealant for exterior and infrastructure horizontal applications. The pre-cured silicone skin enhances UV stability, moisture protection, and durability, making it an ideal solution for exposed expansion joints in commercial and transportation projects.
Use Cases & Advantages
Willseal Color Coreseal H is designed for horizontal expansion joints in high-performance applications, delivering superior movement accommodation and long-term weatherproofing. It maintains sealing integrity in highway longitudinal and transverse joints, ensuring durability in dynamic road conditions. In bridge and parking structure expansion joints, it prevents water ingress and structural deterioration, while in seismic, large, and retrofit joints, it absorbs movement and prevents joint failure in seismically active zones. Additionally, it provides a durable waterproof seal in below-grade connections and ensures long-term performance on plaza decks and pedestrian walkways, even in high-traffic environments. For projects requiring a seamless architectural finish, it is available in custom colors to match surrounding materials.
Built for exposed horizontal applications, Willseal Color Coreseal H is watertight, airtight, and UV resistant, maintaining durability in harsh environmental conditions. It accommodates ± 25% movement (50% total) to ensure structural flexibility, while its pre-cured silicone skin provides chemical and puncture resistance for enhanced durability and aesthetics. The non-invasive anchoring system eliminates the need for mechanical fastening, simplifying installation and reducing labor costs. Its seamless monolithic construction prevents delamination, ensuring consistent performance in high-movement conditions. Available in Concrete Grey, Highway Grey, and Traffic-Grade Black, with custom color options available, Willseal Color Coreseal H delivers high-performance joint sealing with customizable aesthetic integration.
Technical Specifications
Tremco Wilseal Coreseal H Datasheet
Limitations & Storage
Not designed for joints exceeding ± 25% movement (50% total).
Not suitable for submerged joints, roofing applications as a primary seal, or coping and projecting stonework joints.
Avoid contact with harsh chemicals unless a polysulfide finish sealant is applied.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Tremco Willseal Color Coreseal SAF-V
Tamper-Resistant Vertical Expansion Joint Seal
Tremco Willseal Color Coreseal SAF-V is a preformed, closed-cell ethylene vinyl acetate (EVA) copolymer foam engineered for high-security vertical expansion joints requiring tamper resistance, water resistance, and flexibility. This lightweight, compressible joint system features a factory-applied pick-resistant hybrid polyurethane skin, delivering durability and impact resistance while ensuring a watertight, dust-proof, airtight, and noise-reducing seal.
Designed for institutional and public buildings, Color Coreseal SAF-V provides long-term durability in areas prone to vandalism, damage, or heavy pedestrian exposure. The pre-cured sealant facer hardens to a Shore A durometer of 50 ± 10, making it a reliable choice for detention facilities, schools, hospitals, and government buildings.
Use Cases & Advantages
Willseal Color Coreseal SAF-V is designed for vertical expansion joints in high-security and public-access environments, offering tamper resistance, seismic protection, and long-term weather durability. It provides a pick-resistant, tamper-proof seal for correctional facilities and detention centers, ensuring secure containment in restricted areas. In schools and daycare centers, it delivers high-impact resistance, preventing damage in high-traffic environments. Its use in hospitals and healthcare facilities ensures a secure, watertight, and airtight seal, enhancing patient safety and infection control. It also meets strict safety and security standards for government buildings, while public transportation hubs, including train stations, airports, and transit centers, benefit from its vandal-resistant construction. Additionally, it accommodates seismic, large, and retrofit joints, ensuring flexibility in dynamic structures.
Built for high-security applications, Willseal Color Coreseal SAF-V features a factory-applied pick-resistant sealant coating that hardens to 50 ± 10 Shore A durometer, preventing unauthorized removal or damage. It supports ± 25% joint movement (50% total), maintaining flexibility in seismic zones and high-movement environments. The non-invasive anchoring system eliminates the need for mechanical fasteners, simplifying installation while ensuring joint integrity. With compression recovery technology, it withstands repeated movement cycles without degradation, while its hydrophobic EVA foam and hybrid polyurethane coating provide moisture, temperature, and UV resistance. Available in True White and Limestone, with custom colors available upon request, Willseal Color Coreseal SAF-V offers long-term impact and abrasion resistance, making it the ideal solution for high-traffic and high-security environments.
Technical Specifications
Tremco Wilseal Coreseal SAF V Datasheet
Limitations & Storage
Not designed for joints exceeding ± 25% movement (50% total).
Not suitable for submerged joints or cross joints in copings and projecting stonework.
Avoid exposure to harsh chemicals; for chemical resistance, use a polysulfide finish sealant.
Will not adhere to oil- or grease-contaminated surfaces; ensure all substrates are clean, dry, and structurally sound.
Store in a dry, enclosed space at 68°F (20°C) and acclimate material for 24 hours if stored below 50°F (10°C).
Frequently Asked Questions
What are Tremco Willseal expansion joints used for?
Tremco Willseal expansion joints are designed to accommodate structural movement while maintaining a watertight, dust-proof, airtight, and thermally insulating seal. They are commonly used in commercial buildings, parking structures, bridges, stadiums, and seismic applications, ensuring long-term durability against environmental exposure and dynamic joint movement.
How do Tremco Willseal expansion joints accommodate movement?
Tremco Willseal expansion joints are engineered to expand and contract with structural movement, allowing for ±25% to ±50% joint movement, depending on the product. This ensures continued protection against cracking, delamination, and moisture intrusion, even in high-movement environments such as seismic zones and high-traffic areas.
What is the difference between Willseal FR-V, FR-H, and FR-SAF-V?
Willseal FR-V is a fire-rated vertical expansion joint seal with an integrated smoke barrier and 2- to 3-hour fire rating, ideal for fire-rated construction joints.
Willseal FR-H is a fire-rated horizontal joint seal, designed for vehicular and pedestrian traffic, with a factory-applied traffic-grade sealant facer.
Willseal FR-SAF-V is a pick-resistant, tamper-proof fire-rated joint seal, engineered for detention centers, hospitals, schools, and other high-security applications.
Are Tremco Willseal expansion joints waterproof?
Yes. Tremco Willseal expansion joints are engineered to be watertight, preventing moisture infiltration that can lead to mold, corrosion, and material degradation. Products such as Willseal 600, Seismic, and Coreseal feature hydrophobic impregnations and factory-applied silicone coatings for enhanced weather resistance.
What is the difference between Willseal Seismic and Seismic HS?
Willseal Seismic is designed for vertical expansion joints and provides watertight, noise-reducing, and UV-stable sealing in seismic, retrofit, and high-movement applications.
Willseal Seismic HS is the horizontal version, engineered for floor-to-wall and exterior panel joints, delivering similar movement accommodation and weather protection in non-traffic applications.
Which Willseal expansion joints are best for high-security applications?
For tamper-resistant and high-security environments, Willseal FR-SAF-V and Color Coreseal SAF-V are the best choices. These products feature pick-resistant sealant coatings, making them ideal for prisons, hospitals, schools, and government buildings, where vandalism resistance and long-term durability are required.
Do Tremco Willseal expansion joints require mechanical fastening?
No. Willseal expansion joints are pre-compressed and self-expanding, eliminating the need for drilling or mechanical anchoring. This simplifies installation, reduces labor costs, and ensures a uniform, secure fit in expansion joints.
Are Tremco Willseal products UV-resistant?
Yes. Many Willseal products, such as Willseal 600, Seismic, and Coreseal, feature UV-stable coatings and hydrophobic acrylic impregnation, ensuring long-term durability in exposed exterior applications without degradation from sunlight or extreme weather conditions.
What color options are available for Tremco Willseal expansion joints?
Tremco Willseal offers a range of color options, depending on the product. Color Coreseal V, Color Coreseal H, and FR-SAF-V are available in Spectrem standard colors, including White, Limestone, Charcoal, Bronze, and Black, with custom color matching available upon request.
How should Tremco Willseal expansion joints be stored before installation?
For optimal performance, Tremco Willseal expansion joints should be stored in a dry, enclosed space at 68°F (20°C). If stored below 50°F (10°C), the material should be acclimated for at least 24 hours before installation to ensure proper expansion and compression behavior.