H.B. Fuller Ködispace 4SG

H.B. Fuller Ködispace 4SG, initially developed for structural glazing façades, is now widely used in insulating glass for both residential and commercial applications. Its unique material properties create highly durable and energy-efficient insulating glass units (IGUs). Unlike conventional thermoplastic spacers, Ködispace 4SG’s chemically bonds to both the glass and silicone edge seal, ensuring long-lasting energy efficiency and durability.

Product Type: Reactive Sealant

Application Area: Doors, Insulating Glass, Spacer, Windows

Chemical Family: Polyisobutylene Polymers (PIB)

Compatible Substrates & Surfaces: Glass

Equipment Features: Durable, Excellent Energy Performance, Flexible, Gas Retention, High Temperature Stability, Low Moisture Vapor Transmission Rate, Robotically Applied

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Features & Benefits

Labeling Claims
Equipment Features
Product Benefits
  • High productivity due to fully automated application
  • Integrated desiccant
  • Warm-edge-system
  • Improved U-value of IG edge
  • Improved insulation
  • Chemically bonds to glass and most silicone secondary sealants
  • Very low water vapor transmission rate and gas permeability
  • Very high UV resistance
Product Properties

Suitable Substrates

  • Glass


  • Solid compound, can only be applied at elevated temperatures

Surface Requirements

  • Dry
  • Clean
  • Free of grease
  • Free of dust

Surface Cleaning

  • Körasolv GL

Application Method

  • Automatic application

Application Equipment

  • Drum melting system

Applications & Uses

Application Area
Compatible Substrates & Surfaces

Fields of Application

  • Manufacturing of insulating glass

Typical Applications

  • Manufacturing of laminated glass with liquid composite.
  • PIB based desiccant filled spacer for insulating glass.


Physical Properties
ValueUnitsTest Method / Conditions
Density (at 23°C)1.28g/cm³DIN EN ISO 2811-1
Standard Moisture Adsorption Capacity (Tc)3.6%EN 1279-4 annex G
Thermal Conductivity (at 23°C)0.35W/(m·K)EN ISO 10456
Cured Properties
ValueUnitsTest Method / Conditions
Gas Permeation Rate (Argon)0.0014g/(m².h)EN 1279-4 annex D
Gas Permeation Rate (Argon)0.033g/(m².d)EN 1279-4 annex D
Water Vapor Transmission Rate0.15g/(m².d)EN 1279-4 annex D
Material Specifications
ValueUnitsTest Method / Conditions
Volatile contentmax. 0.008%EN 1279-4 annex H
Processing Properties
ValueUnitsTest Method / Conditions
Storage Temperature10 - 30 °C-
Processing Temperature115 - 140 °C-
Melt Volume Flow Rate (10 kg, at 130°C)15.0cm³/10 minDIN EN ISO 1133

Packaging & Availability

Regional Availability
  • Africa
  • Asia Pacific (Excluding Russia)
  • Europe (Excluding Russia)
  • India
  • Latin America
  • North America

Storage & Handling

Shelf Life
18 months
Storage Conditions

Ködispace 4SG should be used within the shelf life specified on the packaging. The storage stability applies to material stored under appropriate conditions only (original unopened containers, recommended storage temperature).