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PermaFlex B

A tough material, available in gun grade only.  Permaflex B combines hardness with some flexibility.  The joint can contract by up to 10% due to additional concrete shrinkage after application – but free contraction joints should be left for 90 days before filling.



  • Good chemical, impact and abrasion resistance offering excellent protection to the joint arris.
  • Low viscosity ensures simplicity of mixing and application.
  • Rapid set minimises traffic disruptions, allowing floor areas to be brought into use quickly
  • Good Shore hardness, with some flexibility.
  • Cures down to -2°C for application in cold stores at the operating temperature.
  • Wide service temperature range: -25°C to 60°C



  • Internal horizontal saw cuts
  • Preformed control joints
  • Repairing concrete slabs where random cracks have occurred due to shrinkage


We are currently updating our technical brochure for this product.  Please contact our sales and technical teams on +44 1752 895288 if you have any queries about product selection and use.

Please also refer to our Materials Safety Datasheet for important usage and safety information.


msds - permaflex b hardener


msds - permaflex b resin



product use

The lists below show where we recommend this product can be used. The bold text shows where the product is best suited.

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