3Mâ„¢ Single Step Primer is designed specifically to promote the adhesion of urethane adhesive/sealants to windshields and other automotive glass applications. This one-part primer is ideal for touching up minor pinchweld scratches and can be used to prime encapsulated glass. It is also suitable as a blackout primer to help protect against UV rays. Apply with 3Mâ„¢ Urethane Primer Daubers
