Stain-Proof Acidic Cleaner - Efflorescence Remover

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Stain-Proof Acidic Cleaner is a new technology acid cleaner for removing efflorescence, rust stains, limescale, grout haze, mortar mess and fireplace soot.

STAIN-PROOF® Acidic Cleaner - Efflorescence Remover

STAIN-PROOF® Acidic Cleaner, formerly known as EFF-ERAYZA™, is a new technology acid cleaner for removing efflorescence, rust stains, limescale, grout haze, mortar mess and fireplace soot. Acidic Cleaner is very powerful and generally more effective and safer to use than traditional industrial acids but does not produce noxious fumes, non-corrosive to metals (except for uncoated aluminium) and temporary contact does not burn skin.

Typical Applications

  • Acidic Cleaner is an acidic cleaner for removing mineral residues including, efflorescence, grout haze, rust marks, limescale & mortar mess
  • Acidic Cleaner does not produce noxious fumes so it can be used indoors and outdoors
  • Suitable for commercial & domestic use on floors, walls, facades, showers, masonry, brickwork, patios, driveways, garage floors.
  • cidic Cleaner is suitable for a wide range of non-acid sensitive stones and other hard surfaces, including, granite, slate, basalt, brick, glass, ceramic and porcelain tile, terracotta.
  • Acidic cleaners are commonly used to clean paving & poured concrete surfaces. If using Acidic Cleaner on concrete or other cementitious surfaces, neutralize the surface as soon as possible after cleaning to minimize etching, with something alkaline, such as Oxy-Klenza dissolved in water, then rinse thoroughly with fresh water.
  • Effective for etching marble, limestone & other acid sensitive stones to achieve a 'honed' (matt) finish
  • WARNING: Acidic Cleaner is acidic and will etch / damage acid sensitive stones such as marble, limestone, travertine and onyx as well as concrete / grout products and uncoated aluminium. Read all of the safety directions and precautions carefully before using.


  • Highly effective for removing common mineral residues including: efflorescence, grout haze, rust marks, soap scum, limescale and mortar mess.
  • Acidic Cleaner can also be used for removing fireplace soot.
  • The power of dangerous traditional acids without the noxious fumes
  • Temporary contact does not burn skin - you have some time to rinse off the Acidic Cleaner (however, rinse immediately after skin contact)
  • Almost zero corrosion of metals, except uncoated aluminum

Available Sizes

  • Quart
  • 5 Gallons


The recommended amount of
Acidic Cleaner will depend on the problem at hand.

Efflorescence, rust stain, fireplace soot:

  • 1/2 quart bottle

Grout haze, limescale, soap scum:

  • 1/4 quart bottle

Mortar mess:

  • 1 quart bottle

Stain-Proof Acidic Cleaner Specification Sheet

Acidic Cleaner Overview

Product Uses And Porosity Chart

Neutralize the acid by dissolving 1 cup of Oxy-Klenza (or other pH base/alkaline cleaner) into a bucket of fresh water and pour it over the surface. Let it sit for approximately 3 minutes.