Great Stuff Pestblock Insulating Foam Sealant blocks insects and pests by sealing gaps, cracks and holes where they commonly enter the home. Specially formulated to block pests and expands to fill, seal and insulate gaps up to 1", forming a long lasting, airtight and water resistant barrier. It is specially formulated with a bitter ingredient and blocks pests out of the home by eliminating points of entry. Contains no pesticides. New Smart Dispenser design eliminates mess and product waste by providing a precise application with no drips. The application is maneuverable and intuitive to use with a simple, trigger gun which saves time. The Smart Dispenser allows the user to reuse Great Stuff for up to 30 days.