A black frame, known because the 'frit', lines the outer edges from the windshields, generally 2-3 inches wide as well as wider on the top. The frit safeguards the urethane molding (in most cases, glue that bonds windshields to vehicle) from the windshields in the sun's ultraviolet sun rays.
With no frit, the urethane would melt and cease to carry the windshields towards the body frame. This is exactly what happens with rear-view mirrors which are improperly installed they disappear the windshields following the glues melt in right from.
With no frit, the urethane would melt and cease to carry the windshields towards the body frame. This is exactly what happens with rear-view mirrors which are improperly installed they disappear the windshields following the glues melt in right from.