Our car windshield repair fluid kit contains polyurethane and silane coupling agents. It forms a protective layer against everyday wear and tear. Its use method is very simple: clean and dry the damaged area of the windshield, drop glue on the cracks on the glass, attach a curing film in the sun for 5 minutes, and finally, clean the residual resin on the surface with a blade. And can effectively prevent the expansion of small cracks, prolong the service life of the windshield, the repaired glass will have no obvious traces, maintain the original transparency.