Duck Max Strength Expanding Foam Seal for Door and Windows, 1 in. x .25 in. x 13 ft. - Walmart.com
Construction Foam 2" Sheets...
4 Lb. Density Expanding Pour Foam, 2 Part Polyurethane Closed Cell Liquid Foam for Boat and Dock Flotation, Soundproofing, Filling Voids, and Insulation (1 Gallon Kit): Amazon.com: Industrial & Scientific