DiamondClear Windshield Repair Resin CR - 30cc Formulated to have the same refractive index as the glass with added surface tensile strength which is ideal for bonding long windshield cracks. Diamond Clear Resins are the industry standard for windshield repair bonding. UV inhibitors that prevent yellowing from occurring over time. High viscosity for hot temperatures 85 plus degrees Fahrenheit. BSI tested for quality. 30cc bottle produces approximately 200 windshield repairs.