Great Stuff™ Pestblock

Great Stuff™ Pestblock Insulating Foam Sealant is a ready-to-use foam sealant that expands up to 1 inch to take the shape of gaps, creating a long-lasting, airtight and water-resistant seal that blocks out spiders, ants, cockroaches, mice and more from entering the home without the use of pesticides.

• Blocks critters, bugs and other pests from your home
• Pesticide-free
• Won’t harm bees
• Expands to fill, seal, and insulate gaps up to 1 inch (25mm)
• Forms a long-lasting, airtight, weather-resistant seal (GS-123)
• Adheres to wood, metal, masonry, glass and most plastics
• Interior/exterior use¹
• Tack-free in 5-15 minutes²; trimmable in one hour
• Paintable, stainable and sandable
• Grey-colored foam for easy identification (GS-120)
• UL classified CCMC 13074-L

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.