Plastic Seals | McMaster-Carr

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Seal OD

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Seal Width

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DFARS Specialty Metals

7,935 Products

Most Likely Products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

23 products

Spring-Loaded Seals

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

54 products

Piston Seals

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

29 products

Edge Seals

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

40 products

Foam

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

1,773 products

All Results

Sealing

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

23 products

Spring-Loaded Seals

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

54 products

Piston Seals

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

29 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

11 products

Wear Rings

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

54 products

Packing Seals

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

124 products

Packing Seal Lubricating Rings

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

8 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

7 products

Buffering Seals

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

9 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

Gasket Tape

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

56 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

109 products

EMI/RFI Shielding Gaskets

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

72 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

63 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

405 products

Hose Coupling Gaskets

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

21 products

Made-to-Order Gaskets

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

4 products

Manway Gaskets

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

4 products

Edge Seals

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

40 products

O-Rings

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

968 products

Backup Rings

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

122 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

61 products

Backer Rods

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

35 products

Backer Rod Insertion Tools

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

1 product

Caulk Gun Nozzles

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

4 products

Caulk Guns

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

4 products

Building and Machinery Hardware

Edge Trim

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

203 products

Grommets

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

215 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

7 products

Surface Guards

Protect walls and other flat surfaces from impact

105 products

Corner Guards

Shield corners on walls and other surfaces from impact

43 products

Wall Bases

Protect the bottom of walls from foot traffic and impact

11 products

Protective Plugs

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

467 products

Protective Caps

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

833 products

T-Slotted Framing and Fittings

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

17 products

Door Drip Guards

Divert rain and snow away from door openings

3 products

Window Film

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

27 products

Vibration-Damping Mounts

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

30 products

Raw Materials

Foam

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

1,773 products

Felt

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

25 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

30 products

Insulating Washers

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

10 products

Fastener Assortments

Stay prepared by keeping fasteners in common sizes and materials on hand

1 product

Retaining Rings

Hold components on a shaft

12 products

Tape

Bind, seal, and mark surfaces

1,081 products

Electrical

Manual Switches

Everything from toggle, push-button, and rocker switches to foot switches

1 product

Wire Sleeving

Bundle wiring and protect from abrasion and heat

517 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Electrical Enclosure Plugs

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

13 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

5 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

1 product

Facility and Grounds Maintenance

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

3 products

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

1 product

Urinal Flanges

Connect a urinal to your drainage system

2 products

Floor Drain Trap Seals

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

4 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Material Handling

Conveyor Brush Holders

Mount conveyor brushes at point of use

1 product

Screw Conveyors

Push material through fixed troughs

7 products

Conveyor Guide Mounting Rod Caps

Cover the ends of conveyor guide mounting rods for a finished look

7 products

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

Shipping Pails

Ship up to 12 gallons of hazardous liquids or solids

3 products

Shipping Jugs

Ship up to seven gallons of hazardous liquids and dispense with control through the narrow opening

8 products

Containers, Storage, and Furniture

Dust Covers

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

16 products

Tank Patches

Spin with a handheld electric router to seal holes in plastic tanks and containers

2 products

Syringe Caps

Cover syringe tips when not in use to protect them and prevent leaks

13 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation

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

2 products

Safety Equipment

Bearing Guards

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

20 products

Communication

Tamper-Evident Seals

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

21 products

Fluid Handling

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

84 products

Pipe and Pipe Fittings

Generally thicker and more rigid than tubing for distributing liquids and gases through your facility

12 products