Construction sealant is a paste-like construction sealing material composed of basic rubber, fillers, curing agents and other additives. After being used, it will cure to become a flexible rubber material, which is bonded to the construction substrate. In order to seal, waterproof and leak-proof, it is mainly applied to the joint seal of building joints. As a kind of construction adhesive, it has significant differences in form and application from other construction adhesives such as glue. Other construction adhesives are generally fluid and are mainly used for bonding and pasting building decorative materials. They are not sealed. Working.

Building sealants can be divided into two types according to their different functions: one is a building structural sealant, and the other is a non-structural sealant. Building structural sealant, also referred to as structural glue, is used for the structural bonding and sealing of glass and other building plates during the production of curtain wall unit parts. These plates are completely bonded to the frame by structural glue, without other fixed connections. . Therefore, structural adhesives have strict requirements on strength and adhesion. Non-structural sealants are other construction sealants other than structural adhesives. The purpose of this type of sealant is to seal the joints and not provide structural bonding. Therefore, there is no strict requirement on the strength, as long as it can adhere well to The sealing effect on the substrate is sufficient. Due to the influence of the thermal expansion and contraction of the substrate on the expansion and contraction of the joint, the sealant must have good elasticity and displacement capacity.