Silicone | McMaster-Carr

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5,103 Products

Sealing

Sealants

Fill and seal gaps in metal, plastic, wood, and other materials

111 products

Sealant Primers

Apply to surfaces before sealant to speed up drying times and improve adhesion

2 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

56 products

Gasket Tape

Stick in place around doors, enclosures, and vents to create a leak-resistant seal

1 product

Gasket Makers

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

61 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

30 products

EMI/RFI Shielding Gaskets

Fit around enclosure doors or data connectors to prevent inaccurate signals and flickering displays

37 products

O-Rings

Fit snugly into a groove between parts to create a leak-resistant seal

1,649 products

O-Ring Cord Stock

Cut to length to create customized seals

50 products

Edge Seals

Block dust, water, and wind from entering the gaps around doors and windows

119 products

Raw Materials

Rubber

Compresses and bounces back to shape; often used for sealing, cushioning, and shock absorbing

1,069 products

Foam

Pockets of air make it lighter in weight than rubber; good for packing, insulating, and sealing

635 products

Fabricating and Machining

Casting Compounds

Mix and pour into molds to capture intricate detail when casting parts, linings, and prototypes

22 products

Electrical

Potting Compounds

Encase electronic assemblies in material that hardens to protect from dust, moisture, and vibration

24 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

4 products

Wire Sleeving

Bundle wiring and protect from abrasion and heat

33 products

Thermal Interface Material

Dissipate heat away from electronic components

24 products

Fluid Handling

Tubing

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

821 products

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

100 products

Lubricating

Grease

Thicker than oil to evenly lubricate surfaces and stay in place

58 products

Penetrating Lubricants

Cut through dirt, grease, and rust to protect tools and components from wear

15 products

Dry-Film Lubricants

Goes on wet and dries to form a nonstick film that lubricates surfaces without attracting dust

8 products

Mold-Release Lubricants

Apply to molds before casting parts to prevent sticking, stretching, and tearing

8 products

Fastening and Joining

Adhesives

Bond surfaces together

12 products

Sealing Washers

Prevent fluids from leaking around fasteners

106 products

Facility and Grounds Maintenance

Protective Coatings

Shield surfaces from the surrounding environment

5 products

Silicone Removers

Clear all traces of silicone from molds and molded parts

1 product

Conformal Coating Removers

Strip conformal coatings from circuit boards for maintenance and repair

3 products

Sealant Removers

Clean sealant and caulk off tools and other surfaces

1 product

Paint and Coating Removers

Cut through paint and other coatings to clean up messes and prepare surfaces for finishing

6 products

Building and Machinery Hardware

Edge Trim

Install on panels, boards, signs, and mirrors to protect edges from impact

23 products