Silicone Sealant is a new type of joint sealing material, silicone sealant belongs to the room temperature curing sealing material, with good weather resistance, high stability, low modulus, high elasticity and other characteristics. Silicone sealant used in the United States of America's national highways, airport pavement, ports and terminals, high-speed rail, bridges and attempts to seal the joints of waterproofing has been more than thirty years, where used, there has never been a large-scale replacement, and can effectively protect the concrete slab for a long time. According to the report of the American Concrete Pavement Association, about 82% of the construction units in the U.S. use silicone sealant to seal the joints.