Trass is a pozzolan that can be added to mortars to reduce capillarity without impacting too much on vapour permeability.


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SKU: 128301.
40 kg
Categories: , .
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Trass is a natural pozzolan that has seen widespread use throughout northern Europe for hundreds of years, creamy beige in colour it?s a well-known Pozzolan derived from volcanic tuffs sourced from the Rhine Valley in Germany. Similar to the volcanic pumices and tuffs from Pozzuoli, the material established by the Romans.

  • Good resistance in salt laden environments
  • Lowers capillarity without impacting too much on vapour permeability
  • Medium pozzolanic index
  • 100% natural material
  • The addition rate in lime mortars is advised at 10 to 20% by volume of the binder.
  • Pure Trass produced in accordance with DIN 51043
  • Available in 40 Kg bags
  • R.B.D. 1000 Kg/m3