Gap Seals | McMaster-Carr

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18,714 Products

Most Likely Products

Edge Seals

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

524 products

T-Slotted Framing Seals

Fill gaps around doors and panels to keep air, dust, and liquid out of T-slotted framing structures

44 products

All Results

Sealing

Edge Seals

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

524 products

Rope Seals

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

135 products

Sealants

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

246 products

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

1 product

Packing Seals

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

231 products

O-Rings

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

10,708 products

O-Ring Cord Stock

Cut to length to create customized seals

295 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

Head Seals

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

11 products

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

533 products

Wear Rings

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

54 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

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

Backup Rings

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

263 products

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

428 products

Hose Washers

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

12 products

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

691 products

Gasket Tape

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

58 products

Made-to-Order Gaskets

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

16 products

Hose Coupling Gaskets

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

94 products

Heat Exchanger Gaskets

Replace front and rear gaskets in shell and tube heat exchangers

23 products

Gasket Sealants

Seal gaskets on metal parts

7 products

Drain Gaskets

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

3 products

Building and Machinery Hardware

T-Slotted Framing Seals

Fill gaps around doors and panels to keep air, dust, and liquid out of T-slotted framing structures

44 products

Weatherstripping

Seal gaps around doors, windows, and frames

88 products

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

24 products

Grommets

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

941 products

Edge Trim

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

434 products

Panel Connecting Trim

Connect two panels while protecting the edges from damage

33 products

Raw Materials

Foam

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

107 products

Measuring and Inspecting

Leak-Detecting Dyes

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

1 product

Fastening and Joining

Adhesives

Bond surfaces together

17 products

Threadlockers

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

19 products

Retaining Compounds

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

43 products

Tape

Bind, seal, and mark surfaces

1,492 products

Sealing Washers

Prevent fluids from leaking around fasteners

240 products

Fluid Handling

Thermal Paste

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

18 products

Tube and Tube Fittings

Typically more flexible than pipe for carrying liquids and gases in short runs around equipment

33 products

Power Transmission

Compressed Air Filter Seals

Replace O-rings in compressed air filters

17 products

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

36 products

Rod End Seals

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

16 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

Facility and Grounds Maintenance

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

Surface Fillers

Repair chips, cracks, and tears in various surfaces

198 products

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

5 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

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

15 products