• Excellent adhesion to glass and metal through a wide temperature range.
• Features an extremely low moisture vapor transmission rate.
• Extremely low argon permeance.
• Non-fogging (100% solids).
• Consistent quality.
• Retains flexibility through a wide temperature range to compensate for thermal movement of the insulating glass unit.
• Resists degradation from ultraviolet light and oxidation.
• Available in both black and gray.
• JS-780 is available in pre-extruded strands for applying to spacer bars and in bulk (slug form) for application by various type extruders.
  • Pre-extruded Strands: 1/8”, 3/32”, 1/16” diameter
  • Slugs: 7.5”D x 9.5” H (15 lb/7 kg)
  • 4.5”D x 7”H (4 lb/2 kg)
  • 9.5”D x 10.5”H (27 lb/12kg)
  • Drums: Steel 55 gallon

JS-780 is used as the primary seal on insulating glass units while providing the main moisture vapor seal between the glass and metal spacer. JS-780 must be used with a secondary seal designed to provide structural strength.