CRL POWR 303HL Series Primerless-to-Glass High Modulus/Low-Conductive Urethane is a superior quality product that is a rapid curing, non-conductive, isocyanate-free and primerless to glass polyurethane adhesive that passes or exceeds the requirements of U.S. Federal Motor Vehicle Safety Standards 212. . With over 1,000 psi of tensile strength and 550 psi lap shear at ultimate cure, PP303HL is one of the safest and strongest urethanes offered as an aftermarket product. Virtually all European vehicles have specifications for high modulus urethane to be used when replacing automotive glass. Additionally, aluminum bodied vehicles require low conductive urethane to prevent electrical current from passing from the glass to the body and creating corrosion.
High modulus is completely different from high viscosity. High Modulus referrs to the physical property of the material after it is cured (stiffness). High viscosity is the physical property of the material in the liquid state (thickness).