GREAT STUFF Gaps & Cracks is a polyurethane-based insulating foam sealant that fills, air-seals and insulates small gaps (less than 1 inch) inside or out. But you probably guessed as much from the name. What you might not have guessed is how easy it is to use (thanks to the straw applicator) or how it expands to take the shape of cracks and voids to form a durable, airtight, and water-resistant bond that eliminates unwanted airflow and helps reduce condensation. 
 
Forms a permanent weather-tight seal to minimize drafts and insect infestation
Exceptional adhesion to building materials
Interior or exterior use
Tack free in 6 minutes; Trims in 30 minutes
Foam elasticity allows for movement/shifting within a structure
Paintable, stainable and sandable
Cream colored foam
Cures rigid
All-direction dispensing
UL Classified