Plastic Seals | McMaster-Carr

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Carbon-Filled Polyethylene

CPVC

Cross-Linked Polyethylene Foam

Fiberglass-Reinforced Polyester Fabric

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Seal OD

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For Use With

Diluted Salt Solutions

Low Stress-to-Seal Flanges

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Seal Width

Thickness

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7,059 Products

Sealing

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

23 products

Piston Seals

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

29 products

Spring-Loaded Seals

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

54 products

Packing Seals

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

133 products

Wear Rings

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

54 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

11 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

Packing Seal Lubricating Rings

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

8 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

109 products

Gasket Tape

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

60 products

Hose Coupling Gaskets

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

21 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

Made-to-Order Gaskets

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

4 products

Drum Plug Gaskets

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

2 products

Manway Gaskets

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

4 products

EMI/RFI Shielding Gaskets

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

2 products

O-Rings

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

980 products

Backup Rings

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

169 products

Backer Rods

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

32 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

65 products

Backer Rod Insertion Tools

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

1 product

Caulk Guns

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

25 products

Caulk Gun Nozzles

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

4 products

Building and Machinery Hardware

Edge Trim

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

169 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

11 products

Grommets

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

275 products

Surface Guards

Protect walls and other flat surfaces from impact

30 products

Protective Film and Tape

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

46 products

Wall Bases

Protect the bottom of walls from foot traffic and impact

11 products

Corner Guards

Shield corners on walls and other surfaces from impact

21 products

Weatherstripping

Seal gaps around doors, windows, and frames

71 products

Door Drip Guards

Divert rain and snow away from door openings

3 products

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

4 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

844 products

T-Slotted Framing and Fittings

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

56 products

Vibration-Damping Mounts

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

30 products

Window Film

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

41 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

31 products

Insulating Washers

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

10 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

1 product

Masking Tape

Temporarily join or protect surfaces

285 products

Mounting Tape

Mount everything from signs and panels to carpet and padding

49 products

Repair and Duct Tape

Permanently join or seal surfaces

Raw Materials

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

555 products

Felt

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

24 products

Electrical Power, Networking, and Controlling

Push-Button Switch Covers

Protect your actuator or prevent unauthorized use

1 product

Wire Sleeving

Bundle wiring and protect from abrasion and heat

518 products

Electrical Enclosure Plugs

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

13 products

Heat-Shrink Tubing

Apply heat to seal and insulate electrical wiring and connections

3 products

Electrical Tape

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

53 products

Wire Sleeving Installation Tools

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

5 products

DIN Rail Caps

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

2 products

Data Port Plugs

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

1 product

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Conductive Tape

Shield cables and electronic components from electromagnetic interference (EMI)

10 products

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

Powder Coating Sprayers

Evenly apply powder coatings to small or large parts

6 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Fluid Handling

Tube Fittings

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

120 products

Pipe Joiners

Connect heavy and difficult-to-position gasketed pipe without powered equipment

1 product

Hose Fittings

Create threaded, barbed, quick-disconnect, and other types of connections between lengths of hose

84 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

70 products

Gauge Guards

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

6 products

Thermal Paste

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

13 products

Communication

Tamper-Evident Seals

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

34 products

Label-Protecting Tape

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

5 products

Floor-Decal-Protecting Tape

Protect floor labels from heavy foot and vehicle traffic

2 products

Material Handling

Conveyor Brushes

Position items on conveyor belts and wipe off debris

72 products

Conveyor Brush Holders

Mount conveyor brushes at point of use

1 product

Low-Friction Tape

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

414 products

Screw Conveyors

Push material through fixed troughs

4 products

Conveyor Guide Mounting Rod Caps

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

7 products

Conveyor Guides

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

3 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 Jugs

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

9 products

Shipping Pails

Ship up to 12 gallons of hazardous liquids or solids

3 products

Shipping Bottles

Ship up to one gallon of hazardous liquids

7 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

4 products

Syringe Caps

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

13 products

Power Transmission

Shaft Collar Adapters

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

12 products

Safety Equipment

Protective Clothing Tape

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

1 product

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

Lighting

Light Filters

Change light color, reduce glare, or filter out light

3 products

Black-Out Paper and Tape

Block out stray and unwanted light

7 products

Door Drip Guard Lights

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

2 products

Heating, Ventilation, and Air Conditioning

Pipe Insulation

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

1 product

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

5 products

HVAC Tape

Seal and patch insulation and duct

3 products

Fabricating and Machining

Seal Pullers

Remove the seals around bearings

2 products

Fixture Plate Plugs

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

2 products