Seal Materials | McMaster-Carr

Filter by

System of Measurement

Width

Color

Black/Fluorescent Yellow

Black/Glow-in-the-Dark Yellow

Black/Red

Black/Reflective Yellow

Thickness

Material

Calcium Sulfate (Gypsum)

Shape

Adjustable-Angle Elbow

Length

Maximum Temperature

Hardness

Hardness Rating

Backing Type

Performance

For Use With

201 Stainless Steel Strapping

302 Stainless Steel Strapping

304 Stainless Steel Strapping

316 Stainless Steel Strapping

Basket Weave Polyester Strapping

Beverage

Bonded Polyester Strapping

Bonded Polyester/Polypropylene Strapping

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

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

Minimum Temperature

Export Control Classification Number (ECCN)

DFARS Specialty Metals

Cross Section Shape

Texture

Environment

High-Pressure Washdown

Flexibility

For Use Outdoors

56,801 Products

Most Likely Products

Rubber

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

6,066 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

691 products

Edge Seals

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

529 products

Foam

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

2,672 products

Cord Stock

Cut to length to create customized seals

470 products

All Results

Sealing

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

691 products

Hose Coupling Gaskets

Form tight seals on cam-and-groove, grip-lock, and twist-claw hose connections

94 products

Gasket Tape

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

94 products

EMI/RFI Shielding Gaskets

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

110 products

Gasket Makers

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

58 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

435 products

Manway Gaskets

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

8 products

Gasket Sealants

Seal gaskets on metal parts

11 products

Heat Exchanger Gaskets

Replace front and rear gaskets in shell and tube heat exchangers

23 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,392 products

Hose Washers

Place inside nozzles and spigots to prevent leaks in an attached hose

12 products

Pipe Flashings

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

13 products

Made-to-Order Gaskets

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

16 products

Boiler Gaskets

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

44 products

Drain Gaskets

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

3 products

Pipe Flashing Seals

Slide over roof flashings for a watertight seal without the need for caulk

3 products

Edge Seals

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

529 products

Rope Seals

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

135 products

Cord Stock

Cut to length to create customized seals

470 products

Sealants

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

276 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

183 products

Caulk Gun Nozzles

Attach to caulk guns to change the shape and amount of sealant that's dispensed

12 products

Caulk Guns

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

62 products

Backer Rods

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

35 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

O-Rings

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

13,871 products

Packing Seals

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

231 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 products

U-Cup Seals

With a lip on both the inside and outside edges, they can be used for sealing rods and pistons

198 products

Head Seals

Maintain a seal even under fluctuating pressure; more reliable than an O-ring with a backup ring

10 products

Wear Rings

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

54 products

Spring-Loaded Seals

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

54 products

Cushioning Seals

Reduce wear and noise in air-powered cylinders by blocking the piston from hitting the cylinder body

5 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

Shaft Repair Sleeves

Cover worn shafts with a smooth and protective sealing surface without machining

21 products

Piston Seals

Prevent leaks inside pistons by creating a seal against the cylinder bore

57 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

50 products

Buffering Seals

Protect hydraulic cylinders from pressure spikes and shock in high-pressure applications

22 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 products

Packing Seal Lubricating Rings

Install between layers of packing seals to distribute lubricants evenly; also known as lantern rings

8 products

Backup Rings

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

360 products

O-Ring Bonding Kits

Everything needed to make O-rings

41 products

Raw Materials

Rubber

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

6,066 products

Foam

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

2,672 products

Felt

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

905 products

Plastic

A lightweight alternative to metal and glass

9,052 products

Ceramic

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

695 products

Fabric

Use to cover, clean, and insulate objects

205 products

Leather

Durable and long lasting; often used for belting, lacing, and sealing applications

54 products

Carbon Fiber

The strongest composite we offer; comparable in strength to 6061 aluminum but lighter in weight

318 products

Mica

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

199 products

Carbon

An electrical conductor that’s often used in electronics and sensors

19 products

Lead

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

8 products

Pigments and Dyes

Add color to liquids, mixtures, and materials

25 products

Building and Machinery Hardware

Edge Trim

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

425 products

Grommets

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

943 products

Surface Guards

Protect walls and other flat surfaces from impact

131 products

Panel Connecting Trim

Connect two panels while protecting the edges from damage

33 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

266 products

Protective Film and Tape

Adhere to surfaces to keep them free of scratches, chemicals, moisture, and germs

93 products

Corner Guards

Shield corners on walls and other surfaces from impact

86 products

Wall Bases

Protect the bottom of walls from foot traffic and impact

12 products

Weatherstripping

Seal gaps around doors, windows, and frames

131 products

Door Drip Guards

Divert rain and snow away from door openings

13 products

Threshold Ramps

Create a gradual incline between uneven floor surfaces for wheelchairs and other wheeled equipment

6 products

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

24 products

Privacy Sprays

Block the view through windows by adding a frosted effect

1 product

Window Film

Apply to windows for privacy, insulation, less glare, and a lower chance of shattering

41 products

Protective Caps

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

1,069 products

Protective Plugs

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

1,009 products

Way Wipers

Sweep debris away from machining tables, rails, and ball screws

23 products

Antislip Tape

Add traction to smooth surfaces, such as floors, rollers, and ladder handrails

11 products

T-Slotted Framing and Fittings

The most versatile system, attach fittings along the continuous slots to build virtually anything

84 products

Electrical Power, Networking, and Controlling

Wire Sleeving

Bundle wiring and protect from abrasion and heat

878 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

96 products

Heat-Shrink Tubing Seal Wrap

Wrap around wire like tape to create a moisture resistant seal before adding heat-shrink tubing

5 products

Electrical Enclosure Plugs

Block or seal holes in outlet boxes and enclosures to keep out debris, dust, and moisture

77 products

Conduit and Fittings

Protect wiring from impact and the environment in runs indoors, outdoors, and underground

225 products

DIN Rail Caps

Guard the edges of DIN rail from damage and create a finished look

2 products

Wire Sleeving Installation Tools

Insert wire and hose into corrugated, spiral wrap, or wraparound sleeving

7 products

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Electrically Insulating Adhesives

Secure hardware on circuit boards while insulating current

24 products

Thermal Interface Pads

Soft and flexible, so they conform to rough surfaces and fill gaps between two surfaces

24 products

Thermal Control Coatings

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

1 product

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

31 products

Toggle Switch Seals

Seal dust and moisture out of switches while leaving the toggle exposed

6 products

Potentiometer Panel Seals

Keep moisture and dust out of potentiometers

4 products

Push-Button Switch Covers

Completely cover push-button switches to protect them from moisture and dust

11 products

Capacitor Boots

Shield capacitors and wire connections to extend their service life and reduce accidental shocks

3 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Data Port Plugs

Keep dust, debris, and moisture out of unused computer ports

3 products

Conductive Adhesives

Bond electrical components and repair circuits

8 products

Conductive Tape

Shield cables and electronic components from electromagnetic interference (EMI)

59 products

RJ45 Connector Security Clips

Lock Ethernet cords in place to prevent unauthorized removal from ports

3 products

RJ45 Connector Repair Clips

Snap onto broken Ethernet plugs to restore their ability to make secure connections

1 product

Rocker Switch Covers

Completely cover rocker switches to protect them from moisture and dust

14 products

Toggle Switch Covers

Completely cover toggle switches to protect them from moisture and dust

16 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

166 products

Insulating Washers

Isolate screws from electrical current and prevent corrosion from mating different metals

10 products

Press-Fit Nuts

Push into drilled or punched holes to add threads to thin panels

2 products

Standoff Caps

Create a finished look on standoffs and protect them from dirt and debris

66 products

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

19 products

Contact Adhesives

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

53 products

Structural Adhesives

Strong enough to replace screws and rivets for many jobs

202 products

Adhesive Dispensing Gun Nozzles

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

75 products

Adhesive Dispensing Gun Cartridges

Fill and then mount in dispensing guns to apply adhesives to surfaces

34 products

Adhesive Accelerators

Speed up the time it takes adhesives to reach full strength

12 products

Threadlockers

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

166 products

Retaining Compounds

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

80 products

Glue Guns

Melt and dispense hot-melt glue

19 products

Adhesive Cement

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

28 products

Instant-Bond Adhesives

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

170 products

Mounting Adhesives

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

68 products

Construction Adhesives

Join a wide range of construction materials, from drywall to carpeting

20 products

Adhesive and Sealant Assortments

A collection of adhesives for routine maintenance and quick repairs

1 product

Footwear Adhesives

Repair rips, split seams, and detached soles to stop leaks in shoes, boots, and waders

1 product

Glue

The first choice for everyday bonding and repairs

29 products

Hot Glue

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

24 products

Anchoring Adhesives

Permanently set threaded rods, studs, and rebar in concrete

25 products

Solder Mask

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

4 products

Tape Dispensers

Store and cut lengths of tape

112 products

Splicing Tape

Connect the ends of paper and film rolls or conveyor belts

18 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

Temporarily join or protect surfaces

435 products

Repair and Duct Tape

Permanently join or seal surfaces

59 products

Welding Cable Covers

Protect the cables on your MIG or TIG guns from weld spatter

6 products

Welding Purge Tape

Create dams in pipes before welding, then wash away with water or steam

2 products

Fluid Handling

Valve Repair Kits

Maintain valves with replacement parts such as seals, plungers, and springs

160 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

346 products

Bore Sealing Plugs

Permanently seal unthreaded holes in pneumatic and hydraulic components

95 products

Tube Fitting Rings

Snap onto push-to-connect fittings to identify different tubing lines

33 products

Pipe and Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases

2,497 products

Pressure Test Fittings

Create a temporary connection point for gauges and other testing equipment

31 products

Gauge Guards

Shield gauges from corrosive liquids and gases; also called diaphragm seals

15 products

Filter Fabric

Fit into irregular shapes and take contaminants out of liquid

29 products

Strainers

Install next to valves and pumps to catch debris in your line

9 products

Thermal Paste

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

18 products

Thermocouple Connector Covers

Shield thermocouple connectors from dust and debris

1 product

Facility and Grounds Maintenance

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

262 products

Toilet Tank Replacement Parts

Replace parts such as flappers, fill valves, and floats in your toilet tank

23 products

Drain Check Valves

Prevent water damage by placing into floor drains to stop sewer back-ups

3 products

Toilet Spuds

Connect wall-mount toilets to a flush valve

14 products

Urinal Spuds

Connect wall-mount urinals to a flush valve

5 products

Toilet Tank-to-Bowl Gaskets

Create a tight seal between a toilet tank and bowl

2 products

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

8 products

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

2 products

Plumber's Putty

Mold into a watertight, removable seal around faucets and drains

3 products

Floor Drain Trap Seals

Stop sewer gases from escaping through rarely used floor drains if the P-trap dries out

4 products

Drain Cleanouts

Create an access point to inspect and clean floor drain pipelines

3 products

Urinal Flanges

Connect a urinal to your drainage system

2 products

Surface Fillers

Repair chips, cracks, and tears in various surfaces

225 products

Protective Coatings

Shield surfaces from the surrounding environment

155 products

Paint

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

85 products

Touch-Up Paint Pens

Cover scratches in paint and coatings

5 products

Wood Stains

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

1 product

Paint Primers

Extend the life of paint and coatings by preparing surfaces beforehand

37 products

Leather Lubricants

Extend the life of leather; also known as castor oil

2 products

Fabric Coatings

Preserve the appearance of fabric by blocking liquids and UV rays

4 products

Wood Stain Pens

Touch up nicks and scratches on wood

1 product

Leather Conditioners

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

2 products

Protective Coating Primers

Prepare metal surfaces for powder coating

2 products

Powder Coating Sprayers

Evenly apply powder coatings to small or large parts

6 products

Sealant Removers

Clean sealant and caulk off tools and other surfaces

2 products

Roof Coatings

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

10 products

Drywall Tape

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

3 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Power Transmission

Rod End Seals

Keep dirt out and lubrication in to extend the life of rod ends

16 products

Compressed Air Filter Seals

Replace O-rings in compressed air filters

23 products

Cylinder Rod Glands

Replace the rod gland on hydraulic cylinders

13 products

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

36 products

Shaft Collar Adapters

Sized specifically to adapt standard shaft collars to pipe, creating a tight fit

12 products

Garter Springs

Exert radial force from all directions to maintain pressure on shafts or in seals

73 products

Heating, Ventilation, and Air Conditioning

Insulation Fill

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

1 product

Spray Foam Insulation

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

18 products

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

8 products

Pipe Insulation

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

876 products

Foam Insulation Coatings

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

1 product

HVAC Tape

Seal and patch insulation and duct

51 products

Air Conditioner Service Valve Caps

Seal off AC service valves to prevent refrigerant from leaking out

2 products

Material Handling

Conveyor Brushes

Position items on conveyor belts and wipe off debris

212 products

Conveyor Guides

Direct and position items on conveyors while keeping them from falling off

10 products

Conveyor Brush Holders

Mount conveyor brushes at point of use

60 products

Low-Friction Tape

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

614 products

Inner Tubes

Pair with a matching tire for a smooth ride

14 products

Dock Door Seals

Close the gap between dock doors and trailers to keep heated or cooled air in and dust out

9 products

Heat-Shrink Wrap

Heat to seal packages or cure composite parts

6 products

Dock Door Shelters

Wrap around trailers where they meet dock doors to shield out the elements better than seals

4 products

Dock Bumpers

Prevent damage to docks and vehicles by absorbing impacts

2 products

Tire Sealants

Prevent tire punctures or plug them on the spot

6 products

Tire Repair Kits

Temporarily patch holes in leaking tires

3 products

Strapping Sealers

Crimp clips onto strapping to hold it tight

23 products

Strapping Buckles

Hold strapping in light duty and low-tension applications

17 products

Strapping Seals

Crimp onto strapping to keep it under tension

28 products

Safety Equipment

Electrical Protection Blankets

Wrap around power lines and electrical equipment to shield workers from high voltage

6 products

Fire Stops

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

59 products

Bearing Guards

Shield bearings from dirt, and protect fingers and tools from moving parts

20 products

Drum Patches

Patch drum leaks to prevent their contents from spilling

2 products

Protective Clothing Tape

Patch rips and seal gloves, boots, and respirators to clothing

1 product

Measuring and Inspecting

Tamper-Evident Paint

Cracks from movement when dried on equipment to indicate vibration or tampering

12 products

O-Ring Gauges

Identify the size of your O-ring

4 products

Leak-Detecting Dyes

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

2 products

Fabricating and Machining

Anodizing Kits

Coat aluminum parts for added resistance to corrosion and chemicals

5 products

Blackener Kits

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

13 products

Polish

Clean, shine, and protect hard surfaces

2 products

Zinc-Plating Kits

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

3 products

Casting Compounds

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

78 products

Fixture Plate Plugs

Keep chips and shavings from clogging or damaging unused holes on fixture plates in milling machines

8 products

Containers, Storage, and Furniture

Dust Covers

Stretch over drums, pails, and other objects to keep out dust and debris

16 products

Lighting

Black-Out Paper and Tape

Block out stray and unwanted light

8 products

Light Filters

Change light color, reduce glare, or filter out light

3 products

Door Drip Guard Lights

Light up your doorway while diverting rain and snow away from it

2 products

Communication

Tamper-Evident Seals

Secure hasps, latches, and other connections to visibly indicate tampering

116 products

Tamper-Evident Seal Presses

Squeeze the handles to seal locks on wire tamper-evident seals

8 products

Floor-Decal-Protecting Tape

Protect floor labels from heavy foot and vehicle traffic

2 products

Label-Protecting Tape

Protect labels from moisture, oil, solvents, alkalies, and most acids

5 products