Zemdrain® is a Controlled Permeability Formliner (CPF) made from fine polypropylene fibres assembled in such a way as to create a sheet with a large number of fine pores of controlled size, with appropriate porosity and permeable to water and air.
Resistance to carbonation, freeze-thaw with salt & chloride diffusion. Reduction of microbiological growth & permeability. Increase of surface strength.
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