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STAIN-PROOF » Products » Sealers » Regular » Acidic Cleaner

Acidic Cleaner

Formerly EFF-ERAYZA™

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 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.

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Typical Applications


Acidic Cleaner is suitable for: a wide range of non-acid sensitive stones and other hard surfaces, including granite, slate, basalt, brick, ceramic and porcelain tile, terracotta. Indoors and outdoors on floors, walls, facades, showers, masonry and brickwork. 


  • Removes efflorescence, grout haze, rust stains, mortar mess and hard water deposits.

  • For non-acid sensitive: stones, pavers, tiles, bricks and masonry.
  • Safer to use than traditional industrial acids such as muriatic and phosphoric, non-fuming.
  • Super concentrated - 1 quart makes approximately 4 gallons of powerful efflorescence remover.
  • Chemically etches acid sensitive surfaces for added traction.


Pack Size

1 Quart (946 mL)

VOC Content

VOC (Calculated): < 5g/L


SHIPPING NAME: DOT (Road) Not regulated for transport as dangerous goods. DOT Remarks: Corrosive to Aluminium, Excepted per 49CFR 173.154(d)(2). IATA and IMDG: UN3265, Corrosive liquid, acidic, organic, n.o.s. (Urea Hydrochloride), 8, III.

Country of Manufacture

Made in the USA with globally sourced materials.

How To Use

  2. If satisfied with test results, first sweep or vacuum all loose dust and dirt from the surface. 
  3. Apply when surface temperature is between 40 – 95 °F (5 – 35 °C). Pre-wet surface with water. 
  4. Pour, brush or spray mixed solution generously onto wetted surface and leave for up
  5. to 3 minutes.  
  6. Do not allow solution to dry on surface. Clean large areas in sections.  
  7. Rub with a white nylon scrub pad, or similar, to clean the surface. 
  8. Always neutralize the acid by dissolving 1 cup of STAIN-PROOF™ Alkaline Cleaner (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. 
  9. Rinse surface thoroughly several times with clean water using a mop or wet vacuum

Dilution Per Standard 2.5G/10 L Bucket 3/4 filled with clean water:

Efflorescence, Rust Marks, Fireplace Soot: 1/2 Quart

Grout Haze, Limescale, Soap Scum: 1/4 Quart

Mortar mess: 1 Quart

Add more STAIN-PROOF™ Acidic Cleaner if needed.


DANGER: May be corrosive to metals(aluminum). Causes skin irritation. Causes serious eye damage. May cause respiratory irritation. KEEP OUT OF REACH OF CHILDREN.


Store in a well-ventilated place.  Keep cool. Do not freeze. 

First Aid: 

If exposed or concerned get medical advice.  IF ON SKIN: Wash with plenty of soap and water.
IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing. If breathing has stopped give artificial respiration.  IF IN EYES: Rinse cautiously with water for several minutes.  Remove contact lenses, if present and easy to do.  Continue rinsing.
IN CASE OF FIRE: Use alcohol resistant foam or normal protein foam for extinction. 

Acidic Cleaner Downloads

Brochure and Specsheet


Acidic Cleaner Specification Sheet

Acidic Cleaner Overview

Product Uses And Porosity Chart


Safety Data Sheets

To request SDS files, please email our Customer Care team at order@drytreat.com.

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ICP Building Solutions Group
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The information on this site is for the use of Dry-treat Pty Ltd and its affiliates in the pursuit of sales and positive exposure of STAIN-PROOF products only.

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