Unmatched clarity once windshield repair resin is cured. Refractivity index precision matched to look crystal clear in windshield rock chip or small cracks. Superior bonding strength withstands the test of time, all season performance, non-yellowing, - Nominal viscosity: 18cps Superior windshield repair resin for all windshield break types including small cracks and rock chips. Exceptional in all climates from -58 degrees to 120 degrees Fahrenheit, optimal glass temperature for glass repair is between 70 and 100 degrees Fahrenheit. Outstanding optical clarity, no need to color match glass with tinted resin. Delta Kits professional grade windshield repair resins provide unparalleled performance. Every proprietary formulation undergoes exhaustive laboratory and field testing to ensure Delta Kits glass repair resins exceed industry standards.