Plastic Seals | McMaster-Carr

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How can we improve?

12,068 Products

Most Likely Products

Edge Seals

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

105 products

Piston Seals

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

43 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

80 products

Spring-Loaded Seals

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

54 products

Foam

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

1,619 products

All Results

Sealing

Piston Seals

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

43 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

80 products

Spring-Loaded Seals

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

54 products

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

20 products

Packing Seals

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

154 products

Buffering Seals

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

22 products

Wear Rings

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

54 products

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

7 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

Edge Seals

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

105 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

88 products

Drain Gaskets

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

3 products

Pipe Gaskets

Form tight seals when connecting flanged pipe fittings

543 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

77 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

979 products

Sealants

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

65 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

Backup Rings

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

169 products

Building and Machinery Hardware

Edge Trim

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

169 products

Grommets

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

226 products

Bumpers

Absorb impact to protect equipment and surfaces from dents and scuffs

11 products

Surface Guards

Protect walls and other flat surfaces from impact

51 products

Protective Film and Tape

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

63 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

76 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

5 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

845 products

T-Slotted Framing and Fittings

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

53 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

Raw Materials

Foam

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

1,619 products

Rubber

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

1,898 products

Felt

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

27 products

Fabric

Use to cover, clean, and insulate objects

14 products

Mica

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

73 products

Fastening and Joining

Sealing Washers

Prevent fluids from leaking around fasteners

57 products

Cushioning Washers

Cushion joints to dampen vibration and protect them from wear

72 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

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

58 products

Threadlockers

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

163 products

Adhesive and Sealant Assortments

A collection of adhesives for routine maintenance and quick repairs

1 product

Structural Adhesives

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

74 products

Retaining Compounds

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

80 products

Glue

The first choice for everyday bonding and repairs

17 products

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

10 products

Contact Adhesives

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

1 product

Construction Adhesives

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

9 products

Hot Glue

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

21 products

Anchoring Adhesives

Permanently set threaded rods, studs, and rebar in concrete

3 products

Masking Tape

Temporarily join or protect surfaces

326 products

Repair and Duct Tape

Permanently join or seal surfaces

Mount everything from signs and panels to carpet and padding

55 products

Solder Mask

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

4 products

Welding Purge Tape

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

2 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

577 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

38 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

Electrical Insulating Adhesives

Secure hardware on circuit boards while insulating current

6 products

Data Port Locks

Block USB or Ethernet ports from unauthorized use

9 products

Conductive Adhesives

Bond electrical components and repair circuits

1 product

Data Port Plugs

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

1 product

Conductive Tape

Shield cables and electronic components from electromagnetic interference (EMI)

59 products

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

17 products

Facility and Grounds Maintenance

Surface Fillers

Repair chips, cracks, and tears in various surfaces

28 products

Paint

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

76 products

Protective Coatings

Shield surfaces from the surrounding environment

46 products

Powder Coating Sprayers

Evenly apply powder coatings to small or large parts

6 products

Touch-Up Paint Pens

Cover scratches in paint and coatings

2 products

Paint Primers

Extend the life of paint and coatings by preparing surfaces beforehand

23 products

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

Roof Coatings

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

4 products

Rebar Caps

Brightly colored to alert workers to exposed rebar and pipe

4 products

Material Handling

Conveyor Brushes

Position items on conveyor belts and wipe off debris

190 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

614 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

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

Strapping Buckles

Hold strapping in light duty and low-tension applications

2 products

Shipping Bottles

Ship up to one gallon of hazardous liquids

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

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

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 and Hose Fittings

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

85 products

Expansion Plugs

Seal pipe and tubing lines when checking for leaks

70 products

Strainers

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

6 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

Heating, Ventilation, and Air Conditioning

Pipe Insulation

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

1 product

Foam Insulation Coatings

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

1 product

Heat Barriers

Protect equipment and surfaces from damage caused by nearby heat sources

6 products

HVAC Tape

Seal and patch insulation and duct

47 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

Fire Stops

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

6 products

Power Transmission

Shaft Collar Adapters

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

12 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

Lighting

Black-Out Paper and Tape

Block out stray and unwanted light

7 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

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