Gap Fillers | McMaster-Carr

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Thickness

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Backing Type

Color

Create-Your-Own

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Hardness Rating

Maximum Temperature

Less than 500° F

500° F to 999° F

1,000° F to 1,999° F

2,000° F to 2,999° F

3,000° F or greater

For Use On

Enclosures and Equipment

Ovens and Furnaces

Walls and Ceilings

Texture

Shape

Flexibility

Material

Calcium Silicate

For Use Outdoors

For Joining

Pressure to Compress 25%

Less than 5 psi

5 psi to 9.9 psi

10 psi to 14.9 psi

15 psi to 24.9 psi

25 psi or greater

Density

Adhesive Type

Concrete Anchoring

Minimum Temperature

-250° F or less

-249° F to -100° F

-99° F to -50° F

-49° F to 0° F

Greater than 0° F

REACH

RoHS

Compliant with Exemptions

Export Control Classification Number (ECCN)

DFARS Specialty Metals

System of Measurement

Cellular Skin Surface

How can we improve?

4,940 Products

Raw Materials

Foam

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

Sealing

Sealants

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

Backer Rods

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

Thread Sealants

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

Caulk Guns

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

Caulk Gun Nozzles

Caulk Gun Nozzles

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

Sealant Primers

Sealant Primers

Apply to surfaces before sealant to speed up drying times and improve adhesion

Backer Rod Insertion Tools

Backer Rod Insertion Tools

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

Fastening and Joining

Adhesives

Bond surfaces together

Retaining Compounds

Retaining Compounds

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

Adhesive Dispensing Gun Nozzles

Adhesive Dispensing Gun Nozzles

Pair with cartridges in dispensing guns to control the flow of adhesive

Adhesive Dispensing Gun Cartridge Plungers

Adhesive Dispensing Gun Cartridge Plungers

Pair with syringes or dispensing-gun cartridges to push adhesive out

Adhesive Dispensing Guns

Adhesive Dispensing Guns

Apply beads of adhesive from a cartridge to surfaces

Tape

Bind, seal, and mark surfaces

Weld-Backing Tape

Weld-Backing Tape

Stick to the back of welding seams to contain spatter and prevent gases from weakening the weld

Heating, Ventilation, and Air Conditioning

Spray Foam Insulation

Spray Foam Insulation

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

Pipe Insulation

Pipe Insulation

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

Insulation Fill

Insulation Fill

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

Thermal Insulation Sheets

Thermal Insulation Sheets

Line the walls of furnaces, freezers, ductwork, and buildings to keep heat in or out

Facility and Grounds Maintenance

Surface Fillers

Surface Fillers

Repair chips, cracks, and tears in various surfaces

Protective Coating Primers

Protective Coating Primers

Prepare metal surfaces for powder coating

Paint Primers

Extend the life of paint and coatings by preparing surfaces beforehand

Hoes

Dig, scrape, and cut vegetation; move and mix materials

Rakes

Collect leaves and debris; spread landscaping and construction materials

Stakes

Anchor objects to the ground and mark off areas

Stake Pullers

Remove stakes from concrete form boards

Concrete Groovers

Concrete Groovers

Add grooves to stop concrete slabs from cracking as they dry, settle, or freeze

Concrete Edgers

Concrete Edgers

Create a rounded, finished-looking edge on poured concrete slabs

Concrete Floats

Concrete Floats

Smooth the surface of concrete and release trapped air and water

Concrete Curing Vibrators

Concrete Curing Vibrators

Increase the strength of concrete mix by shaking trapped air loose

Sealant Removers

Sealant Removers

Clean sealant and caulk off tools and other surfaces

Seam Rollers

Press down the seams where wall coverings meet for a smooth, continuous appearance

Drywall Patches

Drywall Patches

Stick over holes in drywall and cover with drywall compound for quick repairs

Masonry Brushes

Masonry Brushes

Sweep away hardened flecks of mortar, dirt, and other debris

Brooms

Sweep up dust, dirt, and other debris

Drywall Tape

Apply to seams and corners before spreading drywall compound for a finished appearance

Trowels

Spread and scrape mortar, concrete, drywall, and adhesives

Drywall Compound Hawks

Drywall Compound Hawks

Carry drywall compound in one hand so you can apply it with the other

Drywall Compound Mashers

Drywall Compound Mashers

Mix drywall compound in large containers

Grout Floats

Smooth and spread grout between tiles

Brick Jointers

Rub along the mortar between bricks for a uniform, finished appearance

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

Shipping Box Liners

Shipping Box Liners

Line cardboard boxes to keep the items inside at a consistent temperature

Containers, Storage, and Furniture

Drywall Compound Pans

Drywall Compound Pans

Mix small batches of drywall compound and bring them to your work area; also known as mud pans

Concrete Mixing Boxes

Concrete Mixing Boxes

Mix concrete in seamless boxes that won't crack or leak

Tank Patches

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

Fabricating and Machining

Drywall Knives

Smoothly spread drywall compounds and also scrape off paint and debris

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