a heating atmosphere of 60 u00b0 to 100 u00b0 c by this method the reaction of urethanation explosively proceeds and the time for curing the coating can be notably cut because the optimum catalyst for the polyurethane coating can be selected without restriction and the catalyst in a highly concentrated state can be brought into contact with the polyurethane coating application_number US 75882885 A description on an extrusion molded substrate 1 surface position 12 exposed to sliding against glass in the case of weather strip polyurethane paint is applied to form an uncured polyurethane coating 2 a catalyst cure accelerator is applied on this uncured polyurethane coating the composition so produced was then heated to cure the coating 2 a the material for the substrate is not specifically limited examples of the material usable for the substrate include rubber materials such as epdm and cr chloroprene rubber thermoplastic elastomers such as pvc and po general purpose plastic materials metal and wood b the polyurethane paint is not limited to the polyol curing type coating compositions shown below as disclosed in japanese patent application no sho 58 1973 200 084 for example but may embrace moisture curing type coating compositions on the sole condition that they contain isocyanate prepolymer optionally the following coating compositions may incorporate inorganic or organic fillers such as carbon talc silica calcium carbonate chlorinated polypropylene and chlorinated polyethylene 1 hydroxyl prepolymer obtained by the reaction of polyester polyol with organic diisocyanate 100 parts by weight 3 isocyanate prepolymer obtained by the reaction of low molecular polyol with organic diisocyanate 1 to 100 parts by weight c the aforementioned polyurethane paint is generally diluted to suitable viscosity with one of the organic solvents enumerated.