Sikasil® WT-489

High-performance, two-part industrial window bonding silicone

Sikasil® WT-489 is a two-part, neutral-curing, and fast-setting silicone sealant and adhesive suitable for structural bonding of insulating glass units into window frames, back-bedding and heel or toe bead applications.  

  • Designed for adhesion to a wide variety of substrates
  • Compatible with traditional insulating glass edge sealing systems
  • Very good mechanical properties for window bonding applications
  • Optimized application properties for improved productivity of automated mix and dispense equipment
  • Superior UV and weathering resistance
  • Remains flexible over a wide temperature range
  • Long-term durability