P5 is a tough and economical 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. In accordance with NBS Specification J40 (clause 290) – Flexible Sheet Tanking/Damp Proofing.


  • 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