Products : Aqua Mix® : Problem Solvers : Aqua Mix® Sulfamic Acid Crystals

Aqua Mix® Sulfamic Acid Crystals

A granular sulfamic acid to be dissolved in water. Removes grout and mortar haze, rust and mineral deposits including efflorescence.

  WHERE TO BUY Not all products are sold at all stores. Please call the distributor to ensure product availability.
Have a question?


Key Features

  • Removes cured grout and mortar haze
  • Dissolves rust stains, efflorescence and other mineral deposits


Acid resistant natural stone such as granite and slate, ceramic, porcelain, quarry and grout


Health Precautions

CORROSIVE. CAUSES BURNS. HARMFUL IF SWALLOWED. Wear skin and eye protection. Do not breathe dust. Contains sulfamic acid. If in eyes, flush with water for at least 15 minutes. If on skin, wash with soap and water. If respiratory tract is irritated, move to fresh air. If irritation persists, seek medical attention. If swallowed, DO NOT induce vomiting, seek medical attention. KEEP OUT OF REACH OF CHILDREN

Limitations to the Product

  • Do not allow product to come in contact with any non-recommended surface
  • Do not mix with other cleaners
  • Not recommended for highly porous tile such as Saltillo
  • Acids of all kinds may etch, lighten or change the color of cementitious material, metallic glazes and some natural stone such as marble, limestone, travertine and some basalts

Application of Product

USE CHEMICAL-RESISTANT GLOVES, such as nitrile, when handling product.

Read entire label before using. Allow newly grouted installation to cure a minimum of 10 days. Sweep, vacuum, or wipe surface. Pre-wet surface with water. Mix Sulfamic Acid Crystals as follows:

LIGHT TO NORMAL CLEANING: Mix 1/2 cup (150 g) of Crystals to 1 gallon of water. Mix Crystals until dissolved.

HEAVY-DUTY CLEANING: Mix 3/4 cup (225 g) of Crystals to 1 gallon of water. Mix Crystals until dissolved.

Apply solution with mop or sponge. Allow to dwell 1 to 2 minutes. Agitate with white nylon scrub pad or scrub brush. Do not allow solution to dry on surface. Rinse thoroughly with clean water, agitating with white nylon scrub pad or brush to ensure removal of acid. Rinse again in the same manner to be sure acid is removed.

Cleaning of equipment

Clean tools with water before material dries.

Handling & Storage

  • Close container tightly after each use
  • Store in original container only
  • Store in and use in temperatures between 45° F to 85° F (7.2° C to 29.4° C)
  • Store in areas inaccessible to small children
  • Do not reuse empty container, wrap and discard in trash or recycle

Product Maintenance

Properly applied product requires no special maintenance.

Warranty Information

Product Warranty

Custom® Building Products warrants to the original consumer purchaser that its product shall be free from defects in material and workmanship under normal and proper usage for a period of one year following the date of original purchase. Custom's® sole liability under this warranty shall be limited to the replacement of the product. Some states, countries or territories do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty will not extend to any product which has been modified in any way or which has not been used in accordance with Custom's® printed instructions. Custom® makes no other warranties either expressed or implied. This warranty gives you specific legal rights, and you may have other rights that vary from state to state or from one country/territory to another.  This warranty is not transferrable.

Coverage Chart

Coverage rates will vary depending on dilution.

SIZE Min Coverage Max Coverage
1 Pound 300 ft² (28 M²) 500 ft² (46 M²)

© 2016 Custom Building Products. All Rights Reserved.