WPM Class III Liquid Waterproofing Membrane

RLA WPM is a waterborne flexible waterproof membrane designed for use under tiled finishes that is capable of accommodating expected structural movement. RLA WPM is a certified Class III membrane and is compliant to AS4858:2004: “Wet Area Membranes”, when applied in accordance to AS3740:2010 “waterproofing Wet Areas in Residential Buildings”. It is available in grey.


  • Permanently flexible
  • Class III membrane certified to ASTM 4858:2004 wet area membranes when applied in accordance to AS3740:2010
  • Low VOC content
  • Single pack no mixing
  • Excellent adhesion to a wide variety of substrates
  • Safe and easy to use
  • Quick Drying
  • Fibre Reinforced
  • Designed for use with a bond breaker

For use in commercial, residential buildings in internal wet areas such as bathrooms, kitchens, laundry’s, balconies, shower recesses.

Acceptable Substrates
Concrete after curing period of 28 days
Masonry / render after curing period of at least 7 days/ Cement sheeting / underlay / external weatherboard / blue board/ Pre-cast concrete once release agent has been removed/ dissipated / Wet area plasterboard / Villaboard / Structural Plywood Type A (PAA JAS-ANZ) / Brickwork ,Hebel (aggregate block)