Pecora 300SL Silicone Pavement is a one-part, ultra-low modulus elastomer designed for sealing joints in roadways and parking structures. It has excellent unprimed adhesion to concrete, metal and asphalt substrates, superior weather resistance and remains flexible at extremely low temperatures. Pecora 300 SL Silicone Pavement Sealant is a self-levelling product designed for applications on flat surfaces.