styrofoam is a kind of adhesive with foaming and bonding properties, which is mainly used for filling, sealing and bonding the side seams of building doors and windows, expansion joints and holes of components. It is a polyurethane elastic sealing foam material cured by moisture.

styrofoam is composed of polyurethane prepolymer, foaming agent, catalyst, crosslinking agent, etc., which are filled into high-pressure resistant iron cans and filled with propane and other gases. It can be divided into two types: gun type and tube type. The gun type can only be used with a special polyurethane foam gun, and the tube type is equipped with a disposable hose.