What are the characteristics of silicone structural sealant？

Silicone structural sealant is a polymer with siloxane as the main chain. Its molecular structure contains silicon and oxygen atoms, and there is also a carbon group connected to the silicon atom. It has the following basic properties and characteristics.

1.Mechanical properties. Silicone structural sealant performs well in mechanical properties such as tension, compression and shear, and has characteristics such as high elastic modulus and ultimate tensile strength. In contrast, the mechanical properties of polyurethane sealants and acrylic sealants are slightly insufficient.

2. Density and hardness. The density and hardness of silicone structural sealants are relatively small, and they are relatively soft, which can alleviate the stress caused by thermal expansion and contraction of building structures to a certain extent. In contrast, the density and hardness of polyurethane sealants and acrylic sealants are large, relatively hard, and prone to shear and fracture.

3. Corrosion resistance. Silicone structural sealants have strong corrosion resistance and can resist some common corrosive media such as water, oxygen, sulfur dioxide and chloride ions. In contrast, polyurethane sealants and acrylic sealants have poor corrosion resistance to some corrosive media.

4. There are obvious differences between silicone structural sealants and other sealants in terms of chemical composition, mechanical properties, density and hardness, corrosion resistance, etc. These differences also make silicone structural sealants have more superior performance in some specific application scenarios.

What are the performance characteristics of silicone structural sealant

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