Wykamol CM8 Waterproof Membrane is a High Quality, BBA Approved, 8mm Stud Basement Waterproof Tanking Membrane. Wykamol CM8 is manufactured from High Density Polyethylene and is impermeable to water and water vapour. Wykamol CM8 Waterproof Membrane is suitable for the waterproofing of earth retained Walls, Floors and Vaulted Soffits below ground level (i.e in Basements). Wykamol CM8 Waterproof Membrane is suitable for 'Type C' Waterproofing in Basements and delivering a Grade 3 Environment to BS8102:2009 and NHBC Chapter 5.4. and has a life expectancy of the design life of the building / structure. Wykamol CM8 Waterproof Membrane is supported by BBA Certification Certificate Number 18/5595.