Insulating glass polysulfide sealant and silicone sealant are selected according to their different characteristics, and there is no better way to say.
Polysulfide sealant and silicone sealant have their advantages and disadvantages. The advantages of polysulfide sealant are good air tightness, excellent oil resistance, solvent resistance, and water resistance; the disadvantage is poor UV resistance. The advantage of silicone sealant is that it has high strength and excellent weather resistance and aging resistance; the disadvantage is that it has a high water vapor transmission rate and poor oil resistance. When selecting the sealant, it should be selected according to the location where the sealant is used and the characteristics of the material. If used for structural assembly of curtain wall and a insulating glass of the hidden frame, semi-hidden frame, and point-supported glass curtain wall, silicone structural sealant must be selected; framed insulating glass (such as doors and windows, exposed frame glass curtain wall, etc.) should use polysulfide sealant and silicone sealant can also be used.