Weatherstripping Caulk | McMaster-Carr

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120 Products

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.

Self-Leveling Sealants

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

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.

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.

UV-Resistant Glass Sealants

These sealants don't degrade in sunlight.

Glass Sealing Rope

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

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.