Everything You Need to Know About Windshield Repair Resin

February 17, 2012

Expensive windshield replacement work can often be avoided by applying windshield repair resin to cracks and chips. Learn how to apply resin yourself.

Windshield Replacement

Windshield repair resin is a substance used to repair cracks and chips that occur on a car's windshield. Resin is an important part of the windshield repair process, allowing you to avoid a more costly replacement that can run you several hundreds of dollars. The resin is used by a qualified auto glass repair specialist when a crack or other damage occurs to a car's windshield.

Resin Viscosity

Resins come in different thicknesses, known as viscosities. The deeper the damage to the windshield, the more viscous the resin that is used to seal the crack and repair the damage. Viscosity, which is measured in units called cps, can be as low as 20 cps, which is as thin as water, to 1,500 cps, which is as thick as honey.

How Resin Is Applied

Resin is applied to the area where the windshield damage occurs. The viscosity of the resin applied depends on the type of crack or chip. Once applied, a curing process is performed using an ultra-violet light to dry the resin and allow it to seal the windshield. This process can take as little as 30 minutes to 1 hour to complete.

Different Resins Used

Different resins are used during the crack repair. It is an epoxy, which means that it's used as a bonding agent to seal the crack. Many tools are used during the application process of resin, including a vacuum and injector, and when used by a qualified auto glass repair technician, can be applied quickly and correctly.

Resin in Auto Glass Repair Kits

A lower viscosity window resin can be found in an auto glass repair kit that is sold in auto glass repair shops and auto parts stores. This low viscosity substance is used for minor repairs that can be done by you. These are scratches that appear on the surface of the windshield glass. If you are able to run your fingernail across the surface of the scratch without it being caught, this repair can be handled in your own garage, using the resin found in the repair kit.

Where Resins Are Sold

Resins are generally sold to professional windshield repair installers and auto body shops. Other than the low viscosity resins that are found in an auto glass repair kit, most industrial strength commercial resins are not sold on a retail basis. Do-it-yourselfers that are capable of windshield repairs can purchase resin products from online retailers or direct from the manufacturers. In some cases, industrial strength resin can purchased from an auto glass repair shop.