How permeable are panels and products made from PU-bound rubber granulate
The water permeability of products made from PU-bound rubber granulate is primarily determined by their apparent density, which also takes into account the internal structure of the finished component. When the material is produced under low pressure, the irregularly shaped rubber particles lie loosely together, creating air pockets and microchannels. This allows a water flow of approximately 200 to 1000 litres per square metre per hour. Under high pressure, the rubber particles lie almost seamlessly together, making the product nearly or completely waterproof. This value is provided as a comparative reference in the product description.