Cambridge Rubber Engineering Limited production belong to the two-component polyurethane construction sealant curing reaction, there are A, B groups were formed. A group was divided into milky white or light yellow viscous polyurethane prepolymer, group B into mixing additives such as curing agents and dehydration from the black paste or liquid, after curing has a certain degree of flexibility and adhesion, ( A component: component B = 10: 0.8 to 1.2). Primary treatment principle: be sticky surface must be neat deal (available portable cutting machine, wheel, just brush, etc.), so that the exposed adhesive surface layer of solid structure. You must ensure that the joint surface dry, clean, no cream. Surfaces of all dust and cement slurry must clear brush handle clean. Rust and paint protection also need to remove the metal surface. Structures such as quit, can blowtorch drying. Before coating the porous surface must first priming paint. Just brush a thin layer of primer, wait until the sticky surface before coating caulking sealant. (The company is supported by a variety of bottom paint supply). Features excellent wear resistance, low temperature flexibility, performance, adjustable range is wide, large mechanical strength, good adhesion, elasticity, excellent resilience, may be suitable for dynamic joints and deformation joints, expansion joints. Good weather resistance, oil resistance, resistance to biological aging and low prices. The scope of the product is used in civil construction, transportation, precast concrete and other building materials and construction joints connecting fill seal. Senior roads, bridges, runways, underground piping, joint sealing joints and expansion joints and Deformation tunnels and buildings. Notice a building must be kept dry, clean and free of grease. Second, the construction should be preceded by the primer was applied to the surface, until the surface is dry on both sides of 10mm to 50mm at the wide gap affix protective tape to prevent the construction of the structures excess polysulfide rubber surface dirty. Third, the barrel inside a white polysulfide rubber (A component) with a black bag curing agent (component B), stir until no color so far. (Note: Due to the different climatic B component should winter much less in summer) A: B = 10: 0.8-1.2, preceded by a small test. Fourth, the mixing well polysulfide sealant filled with ash squeeze glue gun or knife in the seam compacted fill, then ≥10cm wide putty knife glue gelling. Fifth, after applying the protective tape flat plastic can be removed within 24 hours to avoid water will rain. (≤24 hours dry time, seven days before the irrigation experiment, 28 days to reach full performance.)