The product provides a long-lasting, moisture resistant foam barrier that blocks out pests— ants, roaches, spiders, bees, mice and other rodents—by sealing gaps, cracks and holes where they enter a home. It expands to fill, seal and insulate gaps up to one inch, reducing the need to reapply pesticides regularly. The product contains a bitter, non-pesticide ingredient, Denatonium Benzoate, an additive that has been used for years to make a variety of products, such as electrical wire casing, that deter pests and other animals.