Controlled Permeability Formwork Liners from Zemdrain at Parchem

Above photo shows concrete column where Zemdrain® was used with conventional formwork on the right hand side leaving an uncontaminated, blowhole free surface and on the left no Zemdrain® was used resulting
in a blowhole and blemished surface.

Zemdrain

Controlled permeability formwork liner for high quality durable concrete surfaces

Zemdrain is a thermally bonded polypropylene membrane that is placed to the internal face of formwork to provide a high quality durable surface.

The controlled permeability formwork liner provides a mechanism through which surplus water and air can migrate in a controlled manner resulting in a reduction in the formed surface water/cement ratio and porosity, thereby improving surface strength, durability and overall appearance of the concrete.