Caulk | McMaster-Carr

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Methyl Isobutyl Ketone (MIBK)

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591 Products

Sealants

Silicone Rubber Sealants

Harden at room temperature once applied

44 products

Chemical-Resistant Sealants

Made of fluoroelastomer to resist harsh chemicals, such as sulfuric acid

4 products

Caulk

Seal and fill cracks and voids

9 products

Sealants

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

11 products

All-Weather Application Sealants

Apply on wet surfaces and in cold temperatures

9 products

Noncorrosive Silicone Rubber Sealants

Won't discolor copper, brass, or concrete

13 products

Mildew-Resistant Silicone Rubber Sealants

Resist mold and mildew in high-humidity environments

10 products

All-Weather Application Structural Sealants

The strongest all-weather sealants we offer

6 products

Structural Sealants

Combine the strength of adhesive with the flexibility of sealant

14 products

Non-Hardening Caulk

Stays pliable while keeping out moisture

11 products

Clean Room Sealants

Won't contaminate the air or surfaces in semiconductor, biomedical, and electronics clean rooms

1 product

Self-Leveling Chemical-Resistant Sealants

Flow easily into cracks for a smooth finish and resist harsh chemicals, such as sulfuric acid

5 products

Submersible Sealants

Stand up to water, salt spray, mildew, and UV light

9 products

Acoustical Sealants

Block sound from passing through gaps and joints where walls, floors, and ceilings meet

1 product

Silicone Rubber Sealants with Material Certification

Harden at room temperature once applied

9 products

Removable Caulk

Peel off when no longer needed for a temporary seal

1 product

Low-Outgassing Silicone Rubber Sealants

Release almost no volatile emissions that could damage sensitive electronics, even in a vacuum

2 products

Self-Leveling Silicone Rubber Sealants

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

5 products

Oil- and Fuel-Resistant Sealants

Resist swelling when exposed to oil, fuel, and solvents

3 products

Optically Clear All-Weather Application Sealants

Apply in cold and wet weather and let light pass through for use with solar cells and fiber optics

1 product

Self-Leveling Oil- and Fuel-Resistant Sealants

Flow easily into cracks for a smooth finish and resist swelling from oil, fuel, and solvents

5 products

Oil-Resistant Sealants

Won't degrade from exposure to oil

3 products

Structural Submersible Sealants

The strongest submersible sealants we offer

4 products

Caulking Tape

Press into place for an immediate, light duty seal

1 product

Metal- and X-Ray-Detectable Structural Noncorrosive Silicone Rubber Sealants

Locate a piece if it falls in your food line using metal detectors and X-ray machines

1 product

Puncture-Resistant Sealants

Resist punctures, cuts, and abrasion from heavy wear and tampering

4 products

Vacuum Leak Sealants

Seal leaks in vacuum systems and components

5 products

Structural Oil- and Fuel-Resistant Sealants

Our strongest oil- and fuel-resistant sealants for assembling and repairing fuel systems and tanks

2 products

Self-Leveling Silicone Rubber Sealants with Material Certification

Thinner than non-sagging silicone sealants to flow easily into cracks for a smooth finish

1 product

Optically Clear Sealants

Let light pass through for use with solar cells and fiber optics

2 products

Self-Leveling Sealants

Thinner than non-sagging sealants to flow easily into cracks for a smooth finish

1 product

Structural Noncorrosive Silicone Rubber Sealants

Our strongest noncorrosive sealants

3 products

Noncorrosive Silicone Rubber Sealants with Material Certification

Won't discolor copper, brass, or concrete

1 product

Create-a-Color Caulk

Mix with water-based paint to match the color of your surface

2 products

Membrane Sealants

Keep water out of single-ply PVC or TPO plastic membranes

2 products

Structural Silicone Rubber Sealants

Stronger than standard silicone sealants

4 products

Structural Silicone Rubber Sealants with Material Certification

Stronger than standard silicone sealants

2 products

Roof Joint Sealants

Self-Leveling Roof Joint Sealants

Thinner than non-sagging roof joint sealants to flow easily into cracks for a smooth finish

3 products

Roof Joint Sealants

Seal roof joints to keep out the elements

3 products

All-Weather Application Roof Joint Sealants

Fix roof leaks even in cold and wet weather

2 products

Concrete Joint Sealants

Self-Leveling All-Weather Application Concrete Joint Sealants

Apply in wet and cold weather and flow easily into cracks for a smooth finish

6 products

Concrete Joint Sealants

Seal joints and gaps in concrete

4 products

High-Temperature Concrete Joint Sealants

Form a durable, rock-hard seal after firing for use in ovens and kilns

4 products

High-Strength Self-Leveling Concrete Joint Sealants

Flow easily into cracks for a smooth finish and withstand wear and tear in high-traffic areas

10 products

High-Strength Concrete Joint Sealants

Stand up to heavy wear and tear, such as steel wheel traffic

7 products

All-Weather Application Concrete Joint Sealants

Apply on wet surfaces and in cold temperatures

2 products

$Textured Concrete Joint Sealants$

Textured Concrete Joint Sealants

Textured to match concrete surfaces

2 products

Self-Leveling Concrete Joint Sealants

Thinner than non-sagging concrete joint sealants to flow easily into cracks for a smooth finish

4 products

HVAC Sealants

Form water-resistant seals on metal, plastic, and rubber joints in HVAC applications

3 products

Metal Duct HVAC Sealants

Seal metal-to-metal joints in ductwork

2 products

Glass Sealants

UV-Resistant Glass Sealants

Won't degrade in sunlight

4 products

Structural Glass Sealants

Support glass under heavy loads in equipment and buildings

2 products

Glass Sealing Rope

Press into place to seal leaks and hold glass in window frames

1 product

Glass Sealants

Install glass in aluminum, steel, and wood framing

5 products

Fire-Rated Glass Sealing Tape

Seal glass windows in metal and wood fire-rated doors

3 products

Impact-Resistant Structural Glass Sealants

Withstand impact within hours of application for repairing vehicle and equipment windows

4 products

Edge Sealants

Prevent the edges of tape, signs, and graphics from peeling by sealing out water and debris

2 products

Other Products

Caulk Guns

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

62 products

Structural Adhesives

Strong enough to replace screws and rivets for many jobs

1 product

Construction Adhesives

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

5 products

Caulk Gun Nozzles

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

12 products

Fire Stops

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

9 products

Cartridge Sealing Caps

Slip over the tips of adhesive and sealant cartridges to keep contents from hardening

1 product

Thread Sealants

Create a seal between threaded connections to prevent loosening from vibration

183 products

Sealant Primers

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

9 products

Backer Rods

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

35 products

Surface Fillers

Repair chips, cracks, and tears in various surfaces

3 products

Casting Metals

Melt and pour into molds to make metal parts and prototypes

1 product

Caulk Gun Sleeves

Insulate your caulk gun so contents remain easy to dispense, even in cold weather

1 product

Sealant Removers

Clean sealant and caulk off tools and other surfaces

2 products

Tube Dispensers

Squeeze all the contents out of tubes

2 products

Repair and Duct Tape

Permanently join or seal surfaces

2 products

Backer Rod Insertion Tools

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

2 products