P5 is a tough and economically priced membrane for both remedial and new build construction. It is suitable for sub-ground tanking and also for use above ground to isolate walls which are damp or contaminated with salts.* P5 can be dry lined on walls and screeded or a floating dry board system fitted on floors, and vaulted ceilings above or below ground level* Economical 5mm HDPE cavity drain membrane; Suitable for both walls and floors, above or below ground; Impermeable to water, gas and water vapour; Compatible with other Platon membranes