They have many performance requirements are similar, but building sealant more emphasis on atmospheric change, ultraviolet resistance, aging resistance and other performance; The structural sealant is more important is the strength, elongation, bonding properties and other mechanical properties of the requirements. The two should be selected according to the purpose of use.
The main properties of building sealant:
Aluminum alloy glass curtain wall building sealant is mainly silicone sealant. Weatherproof silicone sealant must be a single component neutral adhesive, acid and alkaline adhesive can not be used, otherwise it will give aluminum alloy and structural silicone sealing tape to adverse effects. The glue can react with water vapor in the air and gradually harden. Therefore, contact with water should be avoided in the storage process to avoid deterioration, but the glue can be adapted to sunlight, rain, snow and ice, ozone and high and low temperatures after curing. Silicone sealant has a variety of colors, light color sealant ultraviolet resistance is weak, only applicable to indoor engineering, aluminum alloy glass curtain wall caulking should be used in dark. According to the "technical Code for Glass curtain wall engineering", the performance of weatherproof silicone sealant should be full of relevant provisions.
Main performance of structural sealant:
The structural sealant for aluminum alloy glass curtain wall is mainly silicone sealant. Because it is connected to glass and glass, glass and aluminum, withstand wind force, earthquake action, weight and temperature changes, plays an important structural role in the curtain wall, so its mechanical properties have higher requirements. As a structural sealant should have two functions: 1, excellent sealing performance; 2. The bonded material has good tensile bonding properties.