501 Hot Melt Butyl Sealant is the primary sealant specially used for insulating glass, which is a key raw material for IG production. It has ultra-low water vapor transmission rate and excellent air tightness, effectively blocking moisture ingress and preventing fogging and condensation inside insulating glass units. It is applied by hot melting with proper fluidity, and offers strong adhesion to glass and aluminum spacers. It features good aging resistance and wide temperature tolerance, and will not harden or crack over time. Matched with silicone secondary sealant, it forms the double sealing system of insulating glass. Widely used for insulating glass of architectural doors, windows and curtain walls.

Appearance: Black butyl rubber, packed in paper drum
Key Features: Ultra-low water vapor transmission rate, excellent air tightness, strong adhesion, temperature and aging resistance, good compatibility with silicone secondary sealant
Application: Primary sealing for insulating glass, processing of insulating glass for architectural doors, windows and curtain walls
Package: Paper drum
Storage & Transport: Store in cool, dry and ventilated warehouse, avoid high temperature and direct sunlight