Sealants | McMaster-Carr

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Calcium Sulfate (Gypsum)

Reaches Full Strength

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DFARS Specialty Metals

4,067 Products

Most Likely Products

Sealants

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

247 products

Adhesives

Bond surfaces together

634 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

179 products

Surface Fillers

Repair chips, cracks, and tears in various surfaces

198 products

All Results

Sealing

Sealants

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

247 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

179 products

Caulk Guns

Cartridge, sausage-pack, and bulk-load caulk guns

52 products

Sealant Primers

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

9 products

Backer Rod Insertion Tools

Quickly set foam backer rods in caulk joints at a consistent depth without puncturing them

2 products

Backer Rods

Insert into gaps before caulking to reduce how much sealant you need and improve adhesion

35 products

Gasket Makers

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

61 products

Gasket Sealants

Seal gaskets on metal parts

7 products

Gasket Tape

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

58 products

Drain Gaskets

Create a watertight seal between your drain and fixture without the mess of plumber's putty

3 products

Fastening and Joining

Adhesives

Bond surfaces together

634 products

Threadlockers

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

112 products

Cartridge Sealing Caps

Slip over the tips of adhesive and sealant cartridges to keep contents from hardening

1 product

Adhesive Dispensing Gun Nozzles

Pair with cartridges in dispensing guns to control the flow of adhesive

78 products

Tube Dispensers

Squeeze all the contents out of tubes

2 products

Glue Guns

Melt and dispense hot-melt glue

12 products

Adhesive Accelerators

Speed up the time it takes adhesives to reach full strength

12 products

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

19 products

Retaining Compounds

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

43 products

Tape

Bind, seal, and mark surfaces

896 products

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Spacers

Unthreaded to create space between two surfaces or objects, often to align them

7 products

Magnet-Receptive Sheets

Cut with scissors to form custom nonmetallic, nonmagnetic surfaces that magnets will stick to

3 products

Facility and Grounds Maintenance

Surface Fillers

Repair chips, cracks, and tears in various surfaces

198 products

Protective Coatings

Shield surfaces from the surrounding environment

139 products

Paint

Renew, enhance, protect, and change the color of surfaces

68 products

Wood Stains

Refresh and protect the appearance of wood surfaces by staining and sealing them

1 product

Wood Stain Pens

Touch up nicks and scratches on wood

1 product

Fabric Coatings

Preserve the appearance of fabric by blocking liquids and UV rays

4 products

Touch-Up Paint Pens

Cover scratches in paint and coatings

5 products

Paint Primers

Extend the life of paint and coatings by preparing surfaces beforehand

37 products

Powder Coating Sprayers

Evenly apply powder coatings to small or large parts

2 products

Protective Coating Primers

Prepare metal surfaces for powder coating

2 products

Leather Conditioners

Recondition, waterproof, and preserve leather; also known as neatsfoot oil

2 products

Floor Finish Applicators

Evenly spread coatings, wax, varnish, and oil across floors

23 products

Leather Lubricants

Extend the life of leather; also known as castor oil

2 products

Roof Brushes

Apply thick roof coatings and patches

1 product

Roof Coatings

Form a water-resistant layer to restore and reinforce your roof

9 products

Surface-Preparation Cleaners

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

10 products

Sealant Removers

Clean sealant and caulk off tools and other surfaces

2 products

Plumber's Putty

Mold into a watertight, removable seal around faucets and drains

3 products

Seam Rollers

Press down the seams where wall coverings meet for a smooth, continuous appearance

7 products

Drywall Tape

Apply to seams and corners before spreading drywall compound for a finished appearance

2 products

Electrical

Potting Compounds

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

65 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

29 products

Solder Mask

Temporarily shield circuit boards from solder, flux, and high temperatures

4 products

Thermal Control Coatings

Give off almost no volatile emissions that could damage sensitive electronics and optics

1 product

Heating, Ventilation, and Air Conditioning

Spray Foam Insulation

Expands to fill in cracks, gaps, and other hollow spaces for a tight seal against drafts and heat

15 products

Foam Insulation Coatings

Shield foam pipe insulation from moisture, UV rays, and ozone

1 product

Fabricating and Machining

Zinc-Plating Kits

Create your own zinc-plating system to add corrosion resistance to steel and iron parts

3 products

Anodizing Kits

Coat aluminum parts for added resistance to corrosion and chemicals

1 product

Blackener Kits

Create a flat, black protective finish on metal tools to resist corrosion and reduce glare

6 products

Raw Materials

Lead

A dense insulator often used to shield against radiation and absorb sound and vibration

2 products

Pigments and Dyes

Add color to liquids, mixtures, and materials

10 products

Fluid Handling

Thermal Paste

Mold heat cable to pipe, eliminating air gaps that lead to heat loss and heater failure

18 products

Safety Equipment

Fire Stops

Prevent fire and smoke from passing through holes in fire-resistant walls and floors

20 products

Drum Patches

Patch drum leaks to prevent their contents from spilling

2 products

Material Handling

Tire Sealants

Prevent tire punctures or plug them on the spot

6 products

Tire Repair Kits

Temporarily patch holes in leaking tires

2 products

Measuring and Inspecting

Leak-Detecting Dyes

Bright colors help you spot leaks in water and hydraulic systems without using ultraviolet light

1 product