NSF Standard Sealants | McMaster-Carr

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Reaches Full Strength

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Performance

Highly Corrosion Resistant

Mixing Required

Begins to Harden

Hardness

Hardness Rating

REACH

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Export Control Classification Number (ECCN)

EAR99

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

DFARS Specialty Metals

146 Products

Sealants

Silicone Rubber Sealants

Harden at room temperature once applied

25 products

Self-Leveling Silicone Rubber Sealants

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

5 products

Structural Sealants

Combine the strength of adhesive with the flexibility of sealant

3 products

Silicone Rubber Sealants with Material Certification

Harden at room temperature once applied

9 products

Submersible Sealants

Stand up to water, salt spray, mildew, and UV light

2 products

Self-Leveling Silicone Rubber Sealants with Material Certification

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

1 product

Mildew-Resistant Silicone Rubber Sealants

Resist mold and mildew in high-humidity environments

4 products

Glass Sealants

UV-Resistant Glass Sealants

Won't degrade in sunlight

1 product

Other Products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

37 products

Gasket Makers

Seal irregular shapes and tiny crevices by applying a bead that hardens into a gasket

1 product

Adhesive and Sealant Assortments

A collection of adhesives for routine maintenance and quick repairs

1 product

Surface Fillers

Repair chips, cracks, and tears in various surfaces

6 products

Surface-Preparation Cleaners

Clean and degrease surfaces so paint, coatings, adhesives, and cement will stick

1 product

Adhesive Cement

Form strong bonds on plastic, rubber, ceramic, and other materials

10 products

Threadlockers

Coat threads on threaded fasteners to prevent loosening from impact and vibration

6 products

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

4 products

Retaining Compounds

Fill gaps to bond shafts, bearings, press-fit assemblies, and other cylindrical metal parts

11 products

Repair and Duct Tape

Permanently join or seal surfaces

4 products

Protective Coatings

Shield surfaces from the surrounding environment

2 products

Sealing Washers

Prevent fluids from leaking around fasteners

7 products