CERAZORB is a lightweight 5 mm thick underlayment system that has been specially designed for use under tile and stone.  CeraZorb offers high energy impact with low weight and will remain unchanged after repeated impact loads. CeraZorb is a Synthetic cork underlayment  that will not rot, swell, absorb water and is anti microbial.  CeraZorb has been tested and has the performance equal to 1/2" natural cork at a much lower price.
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Technical Data