Glorystar Chemicals: the roles and compatibility of primary and secondary seals in insulating glass units
The dual-stage sealing of insulating glass utilises different materials. The first stage typically employs butyl hot-melt sealant to provide the primary barrier; the second stage uses polysulfide or silicone sealant to deliver auxiliary sealing, elastic buffering and protection.
The compatibility between the two sealing materials directly impacts the long-term performance of insulating glass. This article examines how butyl sealant softening and flow relate to temperature or exposure to incompatible substances, demonstrating Glorystar Chemicals B101 butyl hot-melt sealant for IGU and N50 silicone structural sealant.
