Commercial spray foam insulation is available in both one and two component systems. Single-component spray polyurethane foam is used to fill and seal small cracks and voids in your insulation. Two-component applicators combine A and B components that expand rapidly to form a solid foam, thus creating a spray pattern that controls foam application to vertical or horizontal surfaces. As a spray foam insulation distributor, DI has the products you need to effectively seal spaces and save on heating and cooling costs.