Basic knowledge and application areas of sealants

Basic knowledge and application areas of sealants

Sealants are polymer materials used to fill gaps, bond materials and prevent medium leakage. It is widely used in construction, automobiles, electronics, aerospace and other fields. Compared with traditional mechanical seals, sealants have the advantages of simple construction, strong adaptability and low cost.

Main types of sealants
Silicone sealants: excellent weather resistance, commonly used for building curtain walls, doors and windows sealing.

Polyurethane sealants: good elasticity, suitable for expansion joints of roads and bridges.

Acrylic sealants: environmentally friendly and non-toxic, mostly used for interior decoration.

Epoxy resin sealants: high strength, used for packaging of electronic components.

Core performance indicators
Bond strength: determines the bonding strength between the sealant and the bonded material.

Elastic modulus: reflects the ability of the sealant to adapt to deformation.

Temperature resistance: some sealants need to withstand extreme environments of -40℃ to 200℃.

Application scenarios
In construction, sealants can prevent rainwater from leaking; in automobile manufacturing, it is used to bond windshields; in the electronics industry, it protects circuit boards from moisture erosion. With the development of technology, sealants are moving towards environmental protection and high performance.