This is injection resin, this resin matches the optical clarity of the glass. It should be used in conjunction with other windshield repair products to successfully repair a rock chip. Our resin is of the highest quality and is made in the U.S.A. Compatible with all windshield repair systems Low acrylic acid content - Viscosity: 20cps Superior flexibility to compensate for expansion, contraction and glass flex - Outstanding optical clarity Delta Kits proprietary formula - Low toxicity Superior for all break types including cracks - Superior in all climates Formulated for versatility. Proven to be effective in all temperatures since 1983 (36 years in 2019). Including areas that regularly see temperature extremes such as Alaska, Siberia, Arizona and the Middle East, for example Premium Bond 20 windshield repair resin is an ultra-flexible low viscosity 20cps resin and Delta Kits’ best injection resin for all weather conditions and all types of windshield damage. It is an exceptional long crack resin. When only the best will do, choose Premium Bond 20! Available in 15 ml, 250 ml and liter bottles. Premium Bond 20 windshield repair resin is an ultra-flexible low viscosity 20 cps resin. More specifically, it is Delta Kits’ best injection resin for all weather conditions and all types of windshield damage. It is an exceptional long crack resin. When only the best will do, choose Premium Bond 20! Available in 15 ml, 250 ml and liter bottles. Auto glass repair professionals worldwide prefer Delta Kits Premium Bond 20 resin over any other brand!