Rock Chip Repair Resin Quality resin is the key to safe, durable, and better-looking windshield repairs. With tinted options and superior strength, GlasWeld resin is the go-to choice for techs who demand the best. The purpose of windshield repair is simple: Disguise the break and restore the safety of the windshield. The catch? Without quality resin, it’s impossible to accomplish either goal. You can have the best tools and the best skills, but if you’re injecting cheap resin, your repair is compromised. Resin is important.