High-Temperature Seals | McMaster-Carr

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Electrically Insulating

Expandable

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

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DFARS Specialty Metals

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19,871 Products

Sealing

Edge Seals

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

126 products

Rope Seals

Insulate the edges of oven, furnace, and boiler doors to keep heat in

135 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

142 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

315 products

Gasket Makers

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

42 products

Gasket Tape

Seal openings such as those around windows, enclosures, and pipe flanges to prevent leaks

53 products

EMI/RFI Shielding Gaskets

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

1 product

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

274 products

Pipe Flashings

Create watertight seals around vent pipes on roofs, even if they expand, contract, and vibrate

3 products

Gasket Sealants

Seal gaskets on metal parts

4 products

Made-to-Order Gaskets

Send your exact specifications to get gaskets that fit precisely between surfaces

4 products

Boiler Gaskets

Resist heat and steam to form a leak-resistant seal around closures on boilers

44 products

Manway Gaskets

Create a tight seal between the nozzle and lid of tank car manways

4 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

123 products

Packing Seals

Fill in gaps around pump shafts, valve stems, and agitators to prevent leaks

211 products

Spring-Loaded Seals

Seal rods and pistons with a wider range of temperature and chemical resistance than U-cup seals

54 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

7 products

Wear Rings

Guide rods and pistons to prevent uneven wear and extend the life of seals

16 products

Wear Ring Stock

Cut to make wear rings that fit any rod or bore to prevent uneven wear and extend the life of seals

12 products

O-Rings

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

11,569 products

Cord Stock

Cut to length to create customized seals

96 products

Sealants

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

273 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

133 products

Backer Rods

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

14 products

Backup Rings

Extend the life of O-rings and improve their performance under high pressure

360 products

Raw Materials

Rubber

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

1,252 products

Foam

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

518 products

Fabric

Use to cover, clean, and insulate objects

52 products

Mica

An electrical insulator that resists high temperatures; use in circuit breakers and heating elements

199 products

Felt

Thicker and more absorbent than fabric for insulating, polishing, cushioning, and gasketing

20 products

Ceramic

Hard and wear resistant, it also withstands corrosion and high temperatures

10 products

Building and Machinery Hardware

Edge Trim

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

124 products

Grommets

Protect wire, cable, and cords from holes with sharp or rough edges

195 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

13 products

Protective Plugs

Insert into holes in pipe, containers, panels, and parts to keep out debris

214 products

Protective Caps

Protect just about anything, including pipe, flanges, screws, and posts

111 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

176 products

Repair and Duct Tape

Permanently join or seal surfaces

Temporarily join or protect surfaces

69 products

Threadlockers

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

19 products

Adhesive Cement

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

1 product

Adhesive and Sealant Assortments

A collection of adhesives for routine maintenance and quick repairs

1 product

Glue Guns

Melt and dispense hot-melt glue

4 products

Instant-Bond Adhesives

Also known as super glue, these adhesives create strong bonds in under 90 seconds

3 products

Mounting Adhesives

Mount objects with a range of adhesives, including glue-on-a-roll and glue shapes

8 products

Contact Adhesives

Apply adhesive, air dry, and bring surfaces together to bond

3 products

Glue

The first choice for everyday bonding and repairs

3 products

Hot Glue

Melt for rapid bonds in a range of applications, from packaging to woodworking

24 products

Structural Adhesives

Strong enough to replace screws and rivets for many jobs

12 products

Weld-Backing Tape

Stick to the back of welding seams to contain spatter and prevent gases from weakening the weld

7 products

Solder Mask

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

4 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation

Fit around pipe, tubing, and tanks to reduce heat loss or condensation

852 products

Insulation Fill

Blow into walls to fill gaps in existing insulation, or mix as a filler in insulating cement

1 product

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

8 products

HVAC Tape

Seal and patch insulation and duct

2 products

Containers, Storage, and Furniture

Heat Sealers

Seal bags, packages, and film using heat

100 products

Open-Top Bags

Close around material with a staple, twist tie, or heat sealer

169 products

Vacuum Sealers

Create an airtight seal around small parts to prevent damage from moisture and oxidation

6 products

Electrical Power, Networking, and Controlling

Wire Sleeving

Bundle wiring and protect from abrasion and heat

178 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

811 products

Potting Compounds

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

82 products

Electrical Tape

Insulate wire and cable splices, wrap wire harnesses, and repair cable jacketing

6 products

Electrically Insulating Adhesives

Secure hardware on circuit boards while insulating current

12 products

Thermal Control Coatings

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

1 product

Thermal Interface Material

Dissipate heat away from electronic components

46 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

1 product

Fluid Handling

Thermal Paste

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

18 products

Tube Fittings

Make threaded, push to connect, barbed, and other types of connections between lengths of tube

9 products

Material Handling

Low-Friction Tape

Create a slippery lining to keep parts moving or use as a release surface on heat sealers and molds

363 products

Conveyor Brushes

Position items on conveyor belts and wipe off debris

21 products

Heat-Shrink Wrap

Heat to seal packages or cure composite parts

34 products

Facility and Grounds Maintenance

Surface Fillers

Repair chips, cracks, and tears in various surfaces

18 products

Paint

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

4 products

Protective Coatings

Shield surfaces from the surrounding environment

12 products

Fabricating and Machining

Blackener Kits

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

5 products

Safety Equipment

Fire Stops

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

18 products