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Dow Great Stuff

12-Ounce, Pestblock Insulating Foam Sealant

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* Estimated stock levels as of Sun, Sep 15, 2019. All items subject to prior sale. Prices may vary between stores and online. Please call ahead to confirm availablity of items marked as Limited Stock.

  • Specially formulated with a bitter ingredient
  • Contains no pesticides
  • Forms a long-lasting, airtight and water resistant barrier
  • Reduces the need to reapply pesticides
  • Helps improve the home's energy efficiency by sealing gaps and cracks


Blocks critters and bugs such as spiders and ants to mice and rats, from entering your home through gaps, cracks and holes. Forms a long-lasting, airtight and water resistant barrier. Paintable, stainable and sandable. UL classified. Tack-free in 10-15 minutes. One 12 oz can equals up to 19 tubes of caulk.


Color Gray
Composition Methyl Ether, Propane, Paraffin Waxes and Hydrocarbon Waxes, Chlorinated, Isobutane
Drying time 10 - 15 min Tack Free
Flash Point -104° C
Form Foam
Media Water Fog, Dry Chemical, Carbon Dioxide, Foam and Alcohol Resistant Foam
Odor Scent Mild
Packing Type Can
Resists Air and Water
Size 12 oz
Specific Gravity 1.06
Type Specialty Sealant
Usage For Blocks Insects and pests (Such as spiders, ants, bees and mice) From entering The Home by Filling, Sealing and Insulating Gaps, Cracks and Holes up to 1 in