Silicone sealant can be divided into structural sealant and ordinary sealant according to different performance. For a long time, construction engineering has relatively strict requirements for structural adhesive. Because structural adhesive is mainly used for bonding between building materials and the main structure of the building, such as the field of glass curtain wall, the material not only needs to bear the wind load and the dead weight load of glass, but also needs to meet the elastic modulus stipulated by the standard, so its technical content is high. Ordinary sealants are used in common scenes in our daily life. In recent years, with the improvement of people's living standards, the sealant with antibacterial and mildew-proof ingredients has been more and more favored by consumers.
According to the different chemical properties of the material, it can also be divided into deacidification type, dealcoholization type and deketoxime type.
Deacidification type (acid sealant) due to fast curing speed, high bonding strength, the most common application, suitable for sealing, plugging leakage prevention, wind and rain and other purposes, but the curing process produces acetic acid, will cause certain corrosion of metal materials;
Dealcoholization (neutral sealant) in the curing process to avoid the production of acid substances, although strong adhesion, but there is a weakness of relatively slow curing speed;
Ketoxime type is mainly used for structural adhesive, such as glass curtain wall, insulating glass structural bonding sealing and other fields.
Silicone sealant has been widely used in China since the 1980s. Varieties are based on acid silicone sealant, which is the largest variety used at present, mainly used in the field of construction. Due to the rapid development of China's urbanization process, glass curtain wall, aluminum curtain wall and stone curtain wall materials to the rapid development, the requirements for bonding sealing materials have been correspondingly improved, promoting a large number of applications of sealant.