High-Temperature Seals | McMaster-Carr

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Aramid/Fiberglass Fabric

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Diluted Salt Solutions

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Compliant with Exemptions

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DFARS Specialty Metals

Performance

Electrically Insulating

Mount Type

Environment

Flexibility

13,099 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

43 products

Gasket Tape

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

53 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

274 products

EMI/RFI Shielding Gaskets

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

1 product

Pipe Flashings

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

3 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

O-Rings

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

5,332 products

O-Ring Cord Stock

Cut to length to create customized seals

50 products

Backup Rings

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

122 products

Packing Seals

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

211 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

123 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

Sealants

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

261 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

Raw Materials

Rubber

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

1,202 products

Fabric

Use to cover, clean, and insulate objects

54 products

Foam

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

530 products

Mica

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

57 products

Felt

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

20 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

215 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

Tape

Bind, seal, and mark surfaces

480 products

Adhesives

Bond surfaces together

51 products

Threadlockers

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

20 products

Glue Guns

Melt and dispense hot-melt glue

4 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

Containers, Storage, and Furniture

Heat Sealers

Seal bags, packages, and film using heat

24 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

Wire Sleeving

Bundle wiring and protect from abrasion and heat

177 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

780 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

1 product

Potting Compounds

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

65 products

Thermal Interface Material

Dissipate heat away from electronic components

46 products

Thermal Control Coatings

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

1 product

Heating, Ventilation, and Air Conditioning

Pipe Insulation

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

856 products

Insulation Fill

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

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 and Tube Fittings

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

9 products

Material Handling

Conveyor Brushes

Position items on conveyor belts and wipe off debris

21 products

Heat-Shrink Wrap

Create a form-fitting barrier around packages to protect them from moisture and dirt

25 products

Facility and Grounds Maintenance

Paint

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

3 products

Surface Fillers

Repair chips, cracks, and tears in various surfaces

18 products

Protective Coatings

Shield surfaces from the surrounding environment

13 products

Fabricating and Machining

Blackener Kits

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

3 products

Safety Equipment

Fire Stops

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

18 products