AEGIS® Polymer II Resin is engineered specifically for bulls-eyes auto glass damage. This medium-viscosity formula will repair approximately 25 breaks per 4 ml (.14 oz) bottle. Each bottle has an unopened two-year shelf life. Mylar squares (HDW3000) are required for curing and are sold separately. Trust consistency and experience with AEGIS Tools when it comes to choosing windshield repair resin for your auto glass repair business.