Weatherstripping Caulk | McMaster-Carr

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About Sealant Flexibility

Silicone Sealants

Made from silicone, these sealants are RTV (room-temperature vulcanizing).

Silicone Sealants with Material Certification

These sealants include a material certificate with traceable lot number, test report, and product shelf life.

Mildew-Resistant Silicone Sealants

Resistant to mold and mildew, these sealants are well suited to high-humidity environments.

Self-Leveling Silicone Sealants
with Material Certification

These sealants include a material certificate with traceable lot number, test report, and product shelf life.

Self-Leveling Silicone Sealants

Thinner than non-sagging sealants, these flow easily into cracks and have a smooth finish.

Noncorrosive Silicone Sealants

Also known as neutral-cure sealants, these won't discolor copper, brass, and concrete.

Noncorrosive Silicone Sealants
with Material Certification

This sealant includes a material certificate with traceable lot number, test report, and product shelf life.

Low-Outgassing Silicone Sealants

Tested to meet ASTM E595, a standard used by NASA, these sealants fill joints and seams while releasing almost no volatile emissions that could damage sensitive electronics, even in a vacuum.

All-Weather Application Sealants

Apply these sealants in cold temperatures, on wet surfaces, and even through running water.

Sealants

Optically Clear Sealants

Clear enough to read through, these UV-resistant sealants allow optimal light transmission for use with solar cells and fiber optics.

Membrane Sealants

Keep water out of single-ply PVC or TPO plastic membranes with these self-leveling sealants.

Self-Leveling Sealants

Thinner than non-sagging sealants, this sealant flows easily into cracks and has a smooth finish.

Caulk

Non-Hardening Caulk

Also known as thumb-grade caulk, this forms a non-hardening, moisture-resistant seal that remains pliable.

Removable Caulk

Make temporary waterproof seals that peel off when no longer needed.

Caulk

Caulking Tape

Press this adhesive-backed plastic tape into place for an immediate light-duty seal.

Oil-Resistant Sealants

Make tough, flexible, oil-resistant seals.

Glass Sealants

Also known as glazing compounds, use these sealants to install glass in aluminum, steel, and wood framing.

Glass Sealing Rope

Press this pliable rope into place to hold glass in window frames and seal leaks.

UV-Resistant Glass Sealants

These sealants don't degrade in sunlight.

Fire-Rated Glass Sealing Tape

Seal glass windows in metal and wood fire-rated doors.

Structural Glass Sealants

Make seals that support glass under heavy loads in equipment and buildings.