How to choose the right sealant?

How to choose the right sealant?

The compatibility of sealant refers to the property that the contact surface of sealant and other materials does not produce adverse physical and chemical reactions with each other. The adhesion of sealant refers to the adhesion performance of sealant on a given substrate.

1. Sealant products with good compatibility and adhesion with the bonding material should be selected. After the manufacturer selects the sealant, it should conduct compatibility and adhesion tests. Only sealants that pass the compatibility and adhesion tests can be used.

2. Sealant for glass inlay needs to withstand long-term sunlight ultraviolet radiation, so sealant products with good weather resistance and aging resistance and good compression permanent deformation performance should be selected.

3. Sealant for glass inlay and sealant for building joints are two sealants with different uses and cannot be replaced at will.

4. When selecting sealants for the joints between door and window frames and openings, the type, nature, size and hardness of the bonding material, shape structure and process conditions, the load and form (tensile force, shear force, peeling force, etc.) borne by the bonding part, and the special requirements of the material (such as electrical conductivity, thermal conductivity, high temperature resistance and low temperature resistance) should be considered.

5. Before using silicone structural sealants in projects, they should be tested for material compatibility by a nationally recognized testing agency. Products that fail the test shall not be used.

Expired silicone structural sealant products shall not be used. During the use and construction of structural sealants, products of the same brand and batch number should be used. Structural sealants from different companies have different product formulas and production processes, and different product batch numbers also have differences in quality. Therefore, structural sealants and weather-resistant sealant products shall not be mixed in the same project.

6. Sealants must be used within the validity period.