Great Stuff™ Big Gap Filler

Great Stuff™ Big Gap Filler Insulating Foam Sealant is an expanding foam sealant that fills, seals and insulates gaps up to 3 inches. This ready-to-use sealant is specially formulated to take on common areas of energy loss such as rim joists/sill plates, plumbing, HVAC, and other larger penetrations.

• Expands to fill, seal, and insulate gaps up to 3 inches (76mm)
• Forms a long-lasting, airtight, weather-resistant seal (GS-123)
• Adheres to wood, metal, masonry, glass and most plastics
• All-direction dispensing
• Interior/exterior use¹
• Tack-free in 5-15 minutes²; trimmable in one hour
• Paintable, stainable and sandable
• Cream-colored foam for easy identification
• UL Classified
• Available in 12, 16 and 20-oz. cans.

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.