Seam Sealers | McMaster-Carr

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2,099 Products

Sealing

Sealants

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

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

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

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

Gasket Sealants

Gasket Sealants

Seal gaskets on metal parts

Gasket Tape

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

Gasket Makers

Seal irregular shapes and tiny crevices by applying a bead that hardens into a gasket

Fastening and Joining

Adhesives

Bond surfaces together

Cartridge Sealing Caps

Cartridge Sealing Caps

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

Adhesive Dispensing Gun Nozzles

Adhesive Dispensing Gun Nozzles

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

Glue Guns

Melt and dispense hot-melt glue

Tube Dispensers

Tube Dispensers

Squeeze all the contents out of tubes

Threadlockers

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

Adhesive Accelerators

Adhesive Accelerators

Speed up the time it takes adhesives to reach full strength

Adhesive Primers

Adhesive Primers

Prepare surfaces before adding adhesives to improve bonding strength

Retaining Compounds

Retaining Compounds

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

Magnet-Receptive Sheets

Magnet-Receptive Sheets

Cut with scissors to form custom nonmetallic, nonmagnetic surfaces that magnets will stick to

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

Facility and Grounds Maintenance

Surface Fillers

Surface Fillers

Repair chips, cracks, and tears in various surfaces

Protective Coatings

Protective Coatings

Shield surfaces from the surrounding environment

Fabric Coatings

Fabric Coatings

Preserve the appearance of fabric by blocking liquids and UV rays

Touch-Up Paint Pens

Touch-Up Paint Pens

Cover scratches in paint and coatings

Wood Stains

Refresh and protect the appearance of wood surfaces by staining and sealing them

Leather Lubricants

Leather Lubricants

Extend the life of leather; also known as castor oil

Leather Conditioners

Leather Conditioners

Recondition, waterproof, and preserve leather; also known as neatsfoot oil

Protective Coating Primers

Protective Coating Primers

Prepare metal surfaces for powder coating

Roof Coatings

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

Roof Brushes

Apply thick roof coatings and patches

Seam Rollers

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

Sealant Removers

Sealant Removers

Clean sealant and caulk off tools and other surfaces

Drywall Tape

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

Plumber's Putty

Plumber's Putty

Mold into a watertight, removable seal around faucets and drains

Electrical

Potting Compounds

Potting Compounds

Encase electronic assemblies in material that hardens to protect from dust, moisture, and vibration

Conformal Coatings

Conformal Coatings

Secure and insulate components on circuit boards and other electronics

Solder Mask

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

Fabricating and Machining

Anodizing Kits

Coat aluminum parts for added resistance to corrosion and chemicals

Blackener Kits

Create a flat, black protective finish on metal tools to resist corrosion and reduce glare

Zinc-Plating Kits

Zinc-Plating Kits

Create your own zinc-plating system to add corrosion resistance to steel and iron parts

Casting Metals

Melt and pour into molds to make metal parts and prototypes

Fluid Handling

Thermal Paste

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

Material Handling

Inner Tubes

Pair with a matching tire for a smooth ride

Tire Sealants

Prevent tire punctures or plug them on the spot

Containers, Storage, and Furniture

Tank Patches

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

Heating, Ventilation, and Air Conditioning

Foam Insulation Coatings

Foam Insulation Coatings

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

Spray Foam Insulation

Spray Foam Insulation

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

Safety Equipment

Fire Stops

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

Drum Patches

Patch drum leaks to prevent their contents from spilling

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