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JS443 is a high performance, two-component, mercury-free, polyurethane secondary sealant.

  • Mercury-free and solvent-free
  • Contributes to the preservation of our environment
  • Eases the waste treatment
  • Part B is non-abrasive
  • Machinery-friendly rheological behaviour
  • Very high performances
  • Mechanical resistance leading to a minimized I Index and gas loss rate of IG unit
  • Long open time combined with fast curing time

*Please contact us for estimates on delivery times for this products as lead times differ per country.


  • JS443 is compatible with all types of manual and robotic dispensing equipment currently available.
  • In Part B, we recommend using a circuit lined with PTFE to minimize water vapor penetration.
  • After Application, there should be no air entrapped between JS443 and the primary sealant.
  • Make sure there are no air bubbles in the corners.
  • JS443, after mixing, must be homogeneous.
  • Glass must be perfectly clean, with no traces of detergent or any other pollution.
  • Spacers must be clean, dry and free from any other matter.

For full application details, please refer to our Technical Data Sheet.

Technical data

TypeTwo-component Polyurethane
ColorDark anthracite
Mixing Ratio (by volume)100:10 +/- 10%
Working Time*> 20 minutes
Open Time*15 minutes
Shore A Hardness> 40
Tensile Strength> 0.8 MPa

* Typical values

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