GREAT STUFF™ Pestblock Insulating Foam Sealant

GREAT STUFF™ Pestblock

Now with the SMART DISPENSER™!


The Bug And Pest Evictor

Specifically designed to block insects and pests from entering the home, this insulating foam sealant expands to fill, seal and insulate the gaps, cracks and holes where they commonly enter.



  • Blocks critters, bugs and other pests from your home
  • Contains no pesticides
  • Won't harm bees
  • Forms a water-resistant, airtight seal.
  • Seals gaps and cracks up to 1" (25 mm)
  • Helps improve energy efficiency and lower utility bills.
  • Bonds with most building materials and surfaces
  • Indoor & outdoor use

It's easy to use because it's:

  • All-direction dispensing.
  • Grey colored foam.
  • Tack-free in 5–15 minutes. 1
  • Ready to trim within 60 minutes.
  • Paintable, stainable and sandable.
  • UL Classified.
  • CCMC 13074-L
  • Available in 12- and 16-oz. cans.

170 ± 5°F and 50 ± 5 % RH, 1 inch bead diameter, 6 inch length. Cure rate is dependent on temperature, humidity, and size of foam bead.



No drips, less mess - foam stops where you stop.
Reusable for up to 30 days - use again and again.
Precise, greater control.


Down To The Details Of Great Stuff™ Pestblock


Air-Seal Audit Checklist


How To Use Great Stuff™ Pestblock

Read all instructions and safe handling information before you start. GREAT STUFF™ products should not to be used for filling closed cavities or voids such as behind walls and under tub surrounds.


Got a lot of GREAT STUFF™ projects on your to-do list?

Check Out Our Great Stuff™ Products

Great Stuff™ Insulating Foam Sealants Safe Handling

For warnings and precautions, disposal information and more, download GREAT STUFF™ Consumer Safety Information or view our safe handling videos.

If you need assistance, contact us. We're always here to help you through any project.

Download User Safety Information Download Consumer Safety Information Renseignements Sur La Sécurité Du Produit Great Stuffmc Pour Le Consommateur Sur La Sécurité Du Produit Mousse D'étanchéité Isolante Great Stuff Promc

What Project Do You Want To Start?

GREAT STUFF™ Pestblock Insulating Foam Sealant works hard in a lot of places.

Air sealing attics

Learn how to use Great Stuff spray foam insulation to seal your attic, reduce air leaks, and keep out unwanted guests.

Air sealing attics
Read more
Sealing rim joists and sill plates

Did you know that you can save money on energy just by sealing rim joists and sill plates? Find out how to do it with Great Stuff Insulating Foam Sealants.

Sealing rim joists and sill plates
Read more
Sealing pipe penetrations

Learn how to use Great Stuff spray foam insulation to seal pipe penetrations and prevent air leakage from gaps around pipes in your home.

Sealing pipe penetrations
Read more

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