Gap Seals | McMaster-Carr

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18,722 Products

Most Likely Products

Edge Seals

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

T-Slotted Framing Seals

T-Slotted Framing Seals

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

All Results

Sealing

Edge Seals

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

Rope Seals

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

Packing Seals

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

Shaft Seals

Prevent leaks in motors, pumps, and gearboxes

Spring-Loaded Seals

Spring-Loaded Seals

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

Cushioning Seals

Cushioning Seals

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

Head Seals

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

Wear Rings

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

U-Cup Seals

With a lip on both the inside and outside edges, they can be used for sealing rods and pistons

Piston Seals

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

Rod Seals

Maintain pressure inside cylinders and prevent fluid leaks

Buffering Seals

Buffering Seals

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

Rod Wipers

Scrape dirt off rods to keep the inside of cylinders clean

O-Ring Cord Stock

O-Ring Cord Stock

Cut to length to create customized seals

Backup Rings

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

O-Rings

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

10,683 products

Sealants

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

Thread Sealants

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

Tube Fitting Gaskets

Tube Fitting Gaskets

Prevent leaks when connecting sanitary tube fittings

Hose Washers

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

Gasket Material

Gasket Material

Cut custom shapes and sizes to fill gaps between flat surfaces

Gasket Tape

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

Made-to-Order Gaskets

Made-to-Order Gaskets

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

Hose Coupling Gaskets

Hose Coupling Gaskets

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

Heat Exchanger Gaskets

Heat Exchanger Gaskets

Replace front and rear gaskets in shell and tube heat exchangers

Gasket Sealants

Gasket Sealants

Seal gaskets on metal parts

Drain Gaskets

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

Building and Machinery Hardware

T-Slotted Framing Seals

T-Slotted Framing Seals

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

Thresholds

Transition between flooring surfaces and reduce gaps between doors and floors

Weatherstripping

Weatherstripping

Seal gaps around doors, windows, and frames

Edge Trim

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

Grommets

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

Panel Connecting Trim

Panel Connecting Trim

Connect two panels while protecting the edges from damage

Raw Materials

Foam

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

Facility and Grounds Maintenance

Plumber's Putty

Plumber's Putty

Mold into a watertight, removable seal around faucets and drains

Toilet Tank-to-Bowl Gaskets

Toilet Tank-to-Bowl Gaskets

Create a tight seal between a toilet tank and bowl

Toilet Sealing Rings

Toilet Sealing Rings

Prevent leaks where toilets mount to the floor or wall

Flush Valve Replacement Parts

Flush Valve Replacement Parts

Replace virtually any part in the most common flush valve brands

Urinal Sealing Rings

Urinal Sealing Rings

Prevent leaks where urinals mount to the wall

Surface Fillers

Surface Fillers

Repair chips, cracks, and tears in various surfaces

Measuring and Inspecting

Leak-Detecting Dyes

Leak-Detecting Dyes

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

Fastening and Joining

Adhesives

Bond surfaces together

Threadlockers

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

Retaining Compounds

Retaining Compounds

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

Tape

Bind, seal, and mark surfaces

Sealing Washers

Sealing Washers

Prevent fluids from leaking around fasteners

Fluid Handling

Thermal Paste

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

Tube and Tube Fittings

Tube and Tube Fittings

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

Power Transmission

Compressed Air Filter Seals

Compressed Air Filter Seals

Replace O-rings in compressed air filters

Hydraulic Cylinder Seals

Hydraulic Cylinder Seals

Replace seals on the piston or rod end of hydraulic cylinders

Rod End Seals

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

Material Handling

Dock Door Seals

Dock Door Seals

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

Dock Door Shelters

Dock Door Shelters

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

Heating, Ventilation, and Air Conditioning

Insulation Fill

Insulation Fill

Blow into walls to fill gaps in existing insulation, or mix as a filler in insulating cement

Spray Foam Insulation

Spray Foam Insulation

Expands to fill in cracks, gaps, and other hollow spaces for a tight seal against drafts and heat

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)