ChemLink M1 Sealant White - 10oz Cartridge

Chem Link M1 is a moisture cure, multi-purpose structural adhesive/sealant designed for bonding and sealing a wide range of construction materials. M-1 forms a tough, elastic & waterproof seal to most roofing materials, masonry, wood, glass, aluminum and foam.

Bonds to most building surfaces - metal flashing, copings, skylights, HVAC surfaces
Solvent free - 100% solids, will not shrink
Apply at temperatures as low as 32F

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SKU: 17208

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ChemLink M-1 is a high-performance, single-component adhesive and sealant formulated with advanced polyether technology. Designed for rigorous construction and maintenance environments, M-1 delivers consistent results even in challenging field conditions. It cures through exposure to moisture in the air, forming a durable, elastic bond that accommodates significant joint movement — over 35% in both extension and compression.

Unlike many conventional sealants, M-1 is completely solvent-free and 100% solids, which means it won’t shrink, outgas, or release harmful fumes during application or curing. This makes it safe for use in occupied buildings, including schools and healthcare facilities, where air quality is a concern. Its formulation contains no isocyanates, is low in VOCs (under 17 g/L), and complies with stringent environmental regulations such as California’s Proposition 65 and SCAQMD requirements.

M-1 adheres strongly to a wide variety of substrates — concrete, metal, wood, PVC, EPDM, and fiberglass among others — without the need for primers in most cases. It performs reliably in both horizontal and vertical joints, resists UV degradation, and retains flexibility in service temperatures ranging from -40°F to 200°F. Whether sealing flashing on a rooftop, bonding metal brackets to masonry, or installing electrical conduit penetrations, ChemLink M-1 offers dependable, long-lasting adhesion and weatherproofing in virtually any setting.

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Key Features

Dual-Purpose Performance

Functions as both an adhesive and a sealant, offering up to 525% elongation and approximately 400 psi shear strength, suitable for structural applications.

All-Weather Application

Cures effectively in damp, dry, or cold conditions, with application temperatures as low as 32°F (0°C).

Solvent-Free and Non-Toxic

Contains no solvents or isocyanates, resulting in low odor and VOC content under 17 g/L, ensuring safety for both workers and building occupants.

Non-Shrinking and UV Stable

Maintains its volume upon curing and resists discoloration when exposed to UV light, ensuring long-term durability.

Versatile Substrate Compatibility

Adheres to a variety of materials including PVC, EPDM, metals, wood, glass, masonry, concrete, fiberglass, and solvent-sensitive foams.

Efficient Application

Features a 20-minute skin-over time and is paintable within 24 hours, facilitating quick project turnaround.

Recommended Applications

ChemLink M-1 is designed for a broad spectrum of construction and maintenance tasks, providing reliable sealing and bonding solutions across many building systems.

In both commercial and residential roofing, M-1 is commonly used for sealing flashing, coping joints, and skylights. It also serves as a dependable option for emergency roof repairs, offering immediate adhesion and weather resistance even under less-than-ideal conditions.

For penetrations through walls and roofs—such as pipes, cables, and conduit—M-1 provides a watertight seal that maintains flexibility and adhesion over time. Its compatibility with a wide range of substrates ensures long-term performance in these vulnerable areas.

In masonry and concrete work, M-1 is frequently applied to repair cracks, seal vertical and horizontal expansion joints, and bond metal brackets or other components to concrete substrates.

Mechanical systems also benefit from M-1’s capabilities. It is effective for sealing HVAC ducts, thermal insulation, pipe flanges, and mechanical penetrations where durable and flexible bonding is essential.

In solar energy installations, M-1 is used for mounting panels, sealing electrical components, and waterproofing around power distribution points. It provides the durability and temperature tolerance needed for long-term exposure on rooftops.

Finally, M-1 is trusted in lightning protection systems, where it securely bonds grounding cables to structural components, ensuring both electrical continuity and environmental resistance.

Frequently Asked Questions

What substrates are compatible with M-1?

M-1 adheres to a wide range of materials including EPDM, SBS-modified bitumen, aluminum, galvanized metal, stainless steel, engineered plastics, PVC, glass, fiberglass, FRP, wood, block, brick, EPS foam, concrete, and stone.

Can M-1 be applied in cold or damp conditions?

Yes, M-1 cures effectively in damp, dry, or cold climates, with application temperatures as low as 32°F (0°C).

Is M-1 paintable?

Yes, M-1 can be painted within 24 hours of application. However, it’s recommended to test paint compatibility beforehand, especially with polyurethane or oil-based paints.

Does M-1 require a primer?

In most cases, M-1 does not require a primer. However, for high-movement joints or dissimilar substrates, a primer may be necessary to ensure optimal adhesion.

What is the shelf life of M-1?

M-1 has a shelf life of 12 months when stored in unopened containers at 70°F (21°C) with 50% relative humidity.

How should surfaces be prepared before applying M-1?

Surfaces should be clean, dry, and free from contaminants such as dirt, oil, grease, or rust. Isopropyl alcohol is recommended for cleaning. Avoid using petroleum solvents like mineral spirits or xylene.

What are the available colors and packaging options for M-1?

M-1 is available in white, gray, tan, limestone, and black. Packaging options include 5 oz squeeze tubes, 10.1 oz cartridges, 20 oz sausages, 28 oz cartridges, and 2 or 5-gallon pails.

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