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Duromastic ACS

Flexible Acrylic Undertile Waterproofing Membrane

Duromastic ACS is the Number 1 flexible acrylic membrane for waterproofing under tiled balconies, showers and bathrooms.

Duromastic ACS is suitable for use on most common building materials and cures to form a seamless and lap free membrane.

Product Features

  • Waterbased and non-toxic
  • Single pack, simple to apply by brush or roller
  • Withstands constant water immersion
  • Fast drying
  • Retains flexibility
  • ABSAC approved
  • Compatible with most common tile adhesives


  • Showers
  • Bathrooms
  • Balconies
  • Ablution areas
  • Other tiled wet areas

Reinforce using Chopped Strand fibreglass mat or Sontara polyester cloth. (See under waterproofing).

Download Data Sheet

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