Expanding foam is most commonly used for filling ceiling cracks and other holes around the home, such as foundation cracks. It’s also a standard material used for window and door installations as well as around exterior pipes. Also referred to as spray foam or spray insulation, it is made of isocyanate and polyol resin. It’s resistant to heat, water, and ageing, making it the ideal filler to use for large holes and cracks. Despite being a lightweight product, they also double as a structural support option. Depending on your project, you can apply your expanding foam using an expanding foam gun or the aerosol can and applicator. You can also purchase expanding foam tape, which is ideal for sealing your window frames. We offer a large selection of expanding foam products for all projects, including kits and expanding foam guns.