The following products are CRI Certified and have passed CRI’s SOA testing protocol.


CRI Certified

CRI Certified
Wool Safe Approved

Strict Standards for Testing Cleaning Solutions

The CRI Certified Seal of Approval program was launched in 2004 to test the cleaning effectiveness of spot removers, pre-spray, and in-tank cleaning chemicals. CRI uses scientifically accredited cleaning standards to identify which cleaning solutions work best. To earn the Seal of Approval, spot removers and pre-spray/in-tank cleaning solutions are tested on the following criteria:

  • Overall cleaning effectiveness — This ensures that the product removes soil and spots better than plain water.
  • Rate of resoiling — This ensures that the product does not attract dirt to the cleaned areas faster than the rest of the carpet.
  • pH — A more neutral pH ensures that carpet dyes and fibers are not adversely affected.
  • Surface texture change— The product must leave the carpet pile minimally changed after repeated cleanings.
  • Optical brighteners — None are allowed, as they can leave some patches of carpet lighter than the rest.
  • Colorfastness — Products must not be so aggressive that they cause a color change in the carpet.

Water is used as a control variable. This means that the performance of a product is measured against the performance of water, for all of the criteria outlined above.


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