Fasto SM30 is a one-part UL certified, PV Grade, all weather, highly flexible, neutral cure, non-corrosive RTV Silicone Adhesive Sealant. Being non-corrosive, it does not corrode circuit & contacts. It has excellent resistance to weathering, UV Radiation, vibration, moisture, ozone, air borne pollutants, temperature extremes, cleaning detergents, etc. and ensures that it lasts the life of panel. UL File No. E526945. Fasto SM30 has passed RoHs