Gaskets | McMaster-Carr

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39,140 Products

Most Likely Products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,392 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

691 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

435 products

Edge Seals

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

529 products

O-Rings

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

13,722 products

Foam

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

2,654 products

All Results

Sealing

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

1,392 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

691 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

435 products

Gasket Tape

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

94 products

Hose Coupling Gaskets

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

94 products

Hose Washers

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

12 products

EMI/RFI Shielding Gaskets

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

110 products

Drain Gaskets

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

3 products

Made-to-Order Gaskets

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

16 products

Manway Gaskets

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

8 products

Boiler Gaskets

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

44 products

Gasket Makers

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

58 products

Heat Exchanger Gaskets

Replace front and rear gaskets in shell and tube heat exchangers

23 products

Gauge Glass Gaskets

Seal the glass on level indicators to monitor liquids without leaks

14 products

Gasket Sealants

Seal gaskets on metal parts

11 products

Drum Gaskets

Seal lids onto steel and stainless steel drums

6 products

Drum Plug Gaskets

Form a tighter seal in drum openings than with a drum plug alone

7 products

Pipe Flashings

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

13 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

O-Rings

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

13,722 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

51 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 products

Packing Seals

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

231 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

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

109 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

Head Seals

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

10 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

Spring-Loaded Seals

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

54 products

Wear Rings

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

54 products

Cushioning Seals

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

5 products

Shaft Repair Sleeves

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

21 products

Packing Seal Lubricating Rings

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

8 products

Cord Stock

Cut to length to create customized seals

684 products

Sealants

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

275 products

Sealant Primers

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

9 products

Rope Seals

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

135 products

Raw Materials

Foam

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

2,654 products

Rubber

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

5,332 products

Felt

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

871 products

Ceramic

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

469 products

Leather

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

1 product

Carbon

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

19 products

Mica

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

172 products

Gold

Form into electronic components that won't corrode—all with material certificates for traceability

4 products

Platinum

Formable and conductive while resisting extreme heat—all with material certificates for traceability

22 products

Building and Machinery Hardware

Grommets

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

1,069 products

Edge Trim

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

425 products

Panel Connecting Trim

Connect two panels while protecting the edges from damage

33 products

Protective Film and Tape

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

3 products

T-Slotted Framing and Fittings

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

72 products

Strut Channel Covers

Close off the channel to create a raceway for cable or add a finished look

1 product

Weatherstripping

Seal gaps around doors, windows, and frames

131 products

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

24 products

Door Drip Guards

Divert rain and snow away from door openings

13 products

Vibration-Damping Mounts

Attach to machinery to reduce vibration and noise and extend service life

94 products

Window Film

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

5 products

Cam Lock and Latch Covers

Seal off cam locks and latches so dust, dirt, and water don't get in

3 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

752 products

Washers

Nearly every size and shape imaginable, from flat washers to clipped to curved

5,184 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

97 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

9 products

Repair and Duct Tape

Permanently join or seal surfaces

45 products

Contact Adhesives

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

7 products

Structural Adhesives

Epoxy, acrylic, urethane, and other adhesives strong enough to replace screws and rivets

1 product

Construction Adhesives

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

6 products

Fabricating and Machining

Vacuum Workholding Plate Gasketing

Seal off the in-use areas of vacuum chucks

3 products

Pocket Knives

Carry these portable cutting tools in a pocket or on a keychain

21 products

Scissors

Cut through a wide range of materials from paper and plastic to carpet and Kevlar

119 products

Gasket Cutters

Create circular gaskets from pliable material and soft metal

45 products

Utility Knives

Make quick, shallow cuts; often used to open boxes and packages

199 products

Shop Knives

Make deep, repetitive cuts with the exposed blade and easy-to-hold handle

44 products

Hot Knives

Melt through synthetic fabric and rubber, leaving clean edges

15 products

Precision Knives

Make exact cuts in paper, plastic, fabric, and other materials

143 products

Miter Angle Cutters

Make cuts at precise angles; use on weatherstripping, dowels, and trim for door and window frames

3 products

Scalpels

Trim and puncture thin material such as paper, plastic, and fabric

24 products

Razor Blades

Cut through various materials such as leather and rubber; often used in utility knives

28 products

Hole Punches

Punch holes in metal, plastic, and fabric

65 products

Fluid Handling

Tube Fitting Rings

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

33 products

Strainers

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

9 products

Facility and Grounds Maintenance

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

8 products

Faucet Washers

Seal faucet components so they don’t leak

24 products

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

6 products

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

2 products

Toilet Tank-to-Bowl Gaskets

Create a tight seal between a toilet tank and bowl

2 products

Toilet Tank Replacement Parts

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

3 products

Urinal Flanges

Connect a urinal to your drainage system

2 products

Urinal Spuds

Connect wall-mount urinals to a flush valve

5 products

Toilet Spuds

Connect wall-mount toilets to a flush valve

14 products

Protective Coatings

Shield surfaces from the surrounding environment

4 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation

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

100 products

Insulation Sheets

Line the walls of furnaces, freezers, ductwork, and buildings to keep heat in or out

57 products

Power Transmission

Compressed Air Filter Seals

Replace O-rings in compressed air filters

23 products

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

36 products

Cylinder Rod Glands

Replace the rod gland on hydraulic cylinders

13 products

Rod End Seals

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

16 products

Flexible Shaft Coupling Seal Kits

4 products

Electrical Power, Networking, and Controlling

Wire Sleeving

Bundle wiring and protect from abrasion and heat

214 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Electrical Enclosure Fasteners

Mount components to your enclosure without worrying about leaks

3 products

Material Handling

Dock Door Seals

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

9 products

Dock Door Shelters

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

4 products