1, silicone sealant

Silicone sealant matrix material is mainly organic silicon polymer, molecular chain is composed of silicon - oxygen - silicon bond, bond energy than the composition of ordinary rubber carbon - carbon bond is much larger, higher than the ultraviolet energy, so it is very resistant to ULTRAVIOLET aging and various climate aging. Silicone sealant according to the different formula can be designed for hidden frame curtain wall can bear the load and aging of the silicone structure sealant, can also be designed for a variety of curtain wall joint sealing silicone weather-resistant sealant, door and window joint sealant and two insulating glass sealant. Because silicone sealant has excellent aging resistance, it is the preferred bonding and sealing material for curtain wall doors and Windows industry.

2, polyurethane sealant

Polyurethane sealant in the building curtain wall is only limited to the joint sealing of non-glass curtain wall, the surface can be coated with paint, but after long-term ultraviolet radiation, the surface will appear cracking. Therefore, polyurethane sealant is mostly used in non-sunlight sealant joints (building internal joint sealing).

3, polysulfide sealant

Polysulfide sealant has good air tightness, mainly used for two sealing of insulating glass doors and Windows and open frame curtain wall. However, the bonding surface of polysulfide sealant and glass after ultraviolet radiation will appear degumming phenomenon, so in the hidden frame curtain wall, point supported curtain wall and other two sealant exposed to the sun occasions are prohibited to use polysulfide sealant hollow glass piece. In the occasion of large temperature difference, it is also recommended to use silicone structural adhesive as the two sealing of insulating glass. Because when the temperature is low, the negative pressure inside the insulating glass will be large, if the two sealant is not enough to the spacer, it may cause the spacer to slip inward, so that the insulating glass fails.


4, silane modified polyether sealant

Silane modified polyether sealant is also called the organic silicone modified polyether sealant and the silicon alkyl polyether sealant, its with silicone sealant and polyurethane sealant advantages and strengths, showed a high ability to resist deformation displacement, good bonding, coating, environmental friendly, low polluted, low viscosity and good operation, etc. Its aging resistance is slightly better than that of polyurethane sealant, but not as good as that of silicone sealant. After long-term ultraviolet radiation, its surface will also crack, and it can be used for joint sealing of non-glass curtain wall in building curtain wall. Silane modified polyether sealant because of its stress relief, environmental protection, surface can be painted and other characteristics, is very suitable for the cement prefabricated board joint sealing of residential industrial buildings, with the development of domestic residential industrialization and the improvement of interior decoration requirements, has been widely concerned.

5, acrylic sealant

The specific uses of acrylic sealant in building are: sealant for window holes, window frames and window glass sealing insert; For concrete building roof, wall deformation joint sealing sealant (building internal joint sealing); Mildew sealant (its own mold or mold growth can inhibit the sealant), etc. Because of its general performance, the current application in the field of construction is less, most applications are replaced by silicone sealant.