Insulating Foam Sealants

Pestblock Foam Sealant Contractor Kit

  • Everything you need for the job in one convenient kit: Includes 2 Cans of Great Stuff Pro Pestblock 24oz, 1 Great Stuff Foam Dispenser Gun, 4 Plastic Nozzles, 4 Plastic Straws, 1 Can of Great Stuff Cleaner 12oz, 1 Pack of 12 Nitrile Gloves, and 1 Roll of 4"x20" Copper Mesh.
  • Expands to fills, seals, and insulates gaps up to 3 inches (76mm)
  • Blocks critters, bugs, and other pests from your home
  • Grey-colored foam
  • Product Details

    The convenience of the Great Stuff™ Pestblock Foam Sealant Kit has everything you need to help reduce unwanted pests without the use of pesticides. GREAT STUFF PRO™ Pestblock Polyurethane Foam Sealant expands to form a long-lasting, airtight, and water-resistant barrier that blocks critters from entering the home while boosting energy efficiency.


Suggested Products

  • More Product Details

    Great Stuff™ Gaps & Cracks expands to fill openings creating a long-lasting airtight and water-resistant, fire-rated seal around plumbing, electricity penetrations, duct work, sill plates, and rim joists.

    • Adheres to wood, metal, masonry, glass and most plastics
    • Forms a long-lasting, airtight, weather-resistant seal
    • Helps keep insects, moisture/condensation and allergens out
    • Expands to fill, seal, and insulate gaps up to 3 inch (76mm)
    • Fireblock formulated
    • Interior/exterior use1
    • Tack-free in 3-10 minutes2; trimmable in one hour
    • Paintable, stainable and sandable
    • Orange-colored foam for easy inspection identification

    1 Skin of cured foam can discolor if exposed to natural light. Paint or coat foam for the best results.

    2 70 ± 5°F and 50 ± 5 % RH, 1-inch bead diameter, 6-inch length. The cure rate is dependent on temperature, humidity, and size of the foam bead.

    • Mist with water to speed cure.
    • Trim cured foam with serrated blade.
    • Any uncured product that gets on the skin can be removed with acetone.
    • If applied outdoors, be sure to paint or cover foam to prevent discoloration and UV damage.
    • GREAT STUFF PRO™ Polyurethane Foams may be reused for up to 30 days when left attached to the applicator gun and when following proper storage procedures.
    • Shake can vigorously for a minimum of 60 seconds. Tightly secure the can onto the gun before opening the valve to ensure that the can is properly threaded onto the gun basket to prevent leaks. With the can secured, set your desired bead size by adjusting the flow control knob on the back of the gun (bead can be adjusted from 1/8"-3"). Then, pull the trigger to fill the gun with foam, dispensing excess foam into an appropriate waste receptacle. Lastly, test the bead size before applying.
    • Best results if used when product temperature ranges from 60-90°F (15-32°C). The can should not be exposed to temperatures more than 120°F. Cured foam should not be exposed to temperatures in excess of 240°F.
    • Store upright with a foam dispensing gun attached.
    • When applying Great Stuff™ Polyurethane Foam, make sure to wear PPE, including proper eye protection, gloves, and long sleeve clothing.
    • Extinguish any open flames before applying foam
  • Q.Can I clean the Great Stuff™ Black gun?



    Unscrew used Great Stuff Pro™ from dispensing gun.

    Clean the gun basket and tip by generously spraying and removing uncured foam with Great Stuff™ Foam Cleaner.

    Invert the can and install the cleaner onto the dispensing gun.

    Press the trigger to flush the foam into waste receptable until only the cleaner is visible.

    Allow gun to sit for several minutes and repeat with a second flush.

    Remove the can from the dispensing gun and spray into waste receptacle without the can until the gun is completely empty.

    Q.Can mice, insects or other pests chew through Great Stuff™ foam?


    Rodents and small animals, if determined enough, can chew through many materials, including Great Stuff™ foam. We have specifically designed a variation of our Great Stuff™ foam to solve this issue, Great Stuff™ Pestblock and Great Stuff Pro™ Pestblock. They BLOCK insects and pests from entering the home by sealing gaps, cracks and holes where they commonly enter. Great Stuff™ Pestblock and Great Stuff Pro™ Pestblock expand to fill, seal and insulate gaps up to 1" (25 mm), forming a long-lasting, airtight and water-resistant barrier.

    Q.How do I get Great Stuff™ foam off of my skin?


    If the foam has not cured or hardened, use fingernail polish remover (with acetone); a polyglycol-based skin cleanser or corn oil may be effective. Then wash with soap and plenty of water. If the foam has hardened, there is no solvent that will remove it. It will not harm your skin and will wear off over time. To remove cured foam from skin, use a pumice stone (available at most drug stores) and warm, soapy water. Then apply petroleum jelly.

    Q.What is the difference between Great Stuff™ and Great Stuff Pro™ products?


    There are two key differences between Great Stuff™ and Great Stuff Pro™ products:

    Great Stuff™ uses a straw dispenser; Great Stuff Pro™ has both straw- and gun-applicator options to dispense foam.

    Can sizes are larger with Great Stuff Pro™ series, so yield is greater.


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