Silicone building sealant mainly consists of base glue, filler, cross-linking agent, catalyst and other additives. Base adhesive is the basic material of sealant, which determines the performance of sealant. The base rubber is 107 room temperature vulcanized silicone rubber, the chemical structure is hydroxyl terminated polydimethylsiloxane, the filler is some inorganic powder, such as silica, calcium carbonate, calcium bicarbonate, etc., the role of the filler is to provide strength, hardness, rheological properties, etc. Crosslinking agent and catalyst are the curing system of sealant. Sealant changes from liquid state to elastomer through the reaction of base glue, crosslinking agent, catalyst and water in air.

The production process of sealant is to mix all components of sealant evenly. The common production method is to mix the base material and filler with kneader, and grind with grinder if necessary, and then mix the crosslinking agent, catalyst and other auxiliaries with planetary machine under vacuum.

Compared with other types of sealant, silicone building sealant has good elasticity, high temperature resistance and low temperature flexibility, good weather resistance, ozone resistance and UV resistance, long service life, but the cost of silicone is relatively high, which is usually a little more expensive than other types of sealant, with poor strength, especially tear resistance. It is introduced that water resistance is better than polymerization Polyurethane sealant is poor, and its oil resistance is inferior to polysulfide sealant.