Styrofoam is a mainly used for building doors and windows, side seam component expansion joints and hole filling, sealing, bonding. Is a kind of polyurethane elastic sealing foam material which depends on moisture curing. It is divided into two types of gun and tube, the need for the use of special polyurethane foam gun, pipe type with a disposable hose. It is a kind of single component, moisture curing, multi-purpose polyurethane foam filled with elastic sealing material. Styrofoam is polyurethane prepolymer poly body, foaming agent, catalyst and other components packaging are filled in the pressure aerosol cans of special polyurethane products.