white pu sealant 1.white pu sealant for joints of refrigeration , machinery, airport runway 2.high quality white pu ... -2000 white sealant is used for the sealing of the joints of the refrigeration compartment, machinery, airport runway, superhighway, and construction ... the framework of automobile and the sealing of the welding joints and joints; the sealing of the automobile air-cner; the adhesion ...