When the rubber is mainly used for water stop situ concrete construction joints and deformation joints and concrete structure has become one of the basic engineering, such as underground facilities, tunnels, culverts, water aqueducts, dams, reservoir and other structures. Sealing is the use of rubber high elasticity and compression deformation characteristics of elastic deformation under various loads, and thus play an effective fastening seal to prevent leakage of the building structure, water seepage and shock absorption cushioning effect. Foundation engineering, such as underground facilities, tunnels, culverts, water aqueducts, the architectural design generally larger projects, because not continuous casting, or by ground deformation, or due to thermal expansion and contraction of concrete structures caused by temperature changes and other reasons, need left construction joints, settlement and Deformation in these joints must be installed to prevent flood water caused leakage. Sealing located mainly in the construction joints and deformation crack when used in situ concrete and concrete structure has become one of the basic engineering, such as underground facilities, tunnels, culverts, water aqueducts, dams, reservoir and other structures. One: Rubber Sealing and sealing rubber-based natural rubber and synthetic rubber primary raw material, mixed with various additives and fillers, the mastication, mixing, forming limit, its breed standards more, there bridge, mountain-type, P, U-shaped, Z-type, B, T, H-type, E-type, Q type. Based on the use of the case can be classified as buried rubber water stop and backing with rubber water stop. The sealing materials having excellent elasticity, abrasion resistance, aging resistance and tear function, diet modification ability, waterproof function is good, the temperature operating range of -45 ℃ -. + 60 ℃ when the temperature exceed 70 ℃, and When the rubber water stop by the intense oxidation effect or by the oil and other organic solvents, corrosion, shall not use rubber water stop. Two: Rubber Sealing is the use of high elasticity of rubber and compression deformation occurs pressure bomb tensile deformation under various loads. Permanent joints and seams on the surrounding bedrock is mainly used for underground and tunnel projects, played fastening seal to prevent leakage of water seepage effect, to ensure the service life of the building project