Our 2 pound general purpose foam can be used in tub bottom inlay applications to stop movement and assist in building strength, never use as structural support alone. Works great to stop squeaky tub and shower bottoms. It's also excellent for insulation and floatation applications. Part A, Part B, equal mix 2-3 oz. each (Part "A" & "B") will create a foam area about the size of a basketball. Poured alone onto the floor should rise 3 inches.
Our 5 pound foam is the only recommended tub/shower installation pour foam by manufacturers. Mix, shake, pour onto the floor and set the tub. Superior for tub bottom injections in conjunction with inlayapplication. Due to it's high density it can expand up to 2/3 the volume of 2 pound industrial grade foam (1.5 inch rise).