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Removing stains left after grouting tile with an epoxy grout.
Epoxy grout has a reputation for being difficult to use and very difficult to clean up from the tile face. The standard cement/sand grout has its cement type residue removed with our "Grout Residue Remover". However, this in not the product for removing the residue of epoxy grout that is 100% epoxy with no cement.
Another grout type is "modified" or "poly" additive grout. This is cement, sand, and an additive like latex or acrylic compounds. See the page for cleaning cement type grout residue for the section on this type.
There is no cement in true epoxy grout. Therefore, there is no cement to react with a cleaner like "Grout Residue Remover". True epoxy grout is only epoxy and sand. Therefore, what is required is a product to react with an epoxy binder, not a cement binder. Aldon "Premium Stripper" breaks down epoxy sealers and will, therefore, break down the epoxy binder in epoxy grout. The directions on the "Premium Stripper" label discuss removing sealers, but the same process is used for epoxy grout residue.
As with "Grout Residue Remover" and cement grout, do not overuse Premium Stripper on epoxy grout. It would take a lot of "Premium Stripper" to remove grout from the grout line between the tiles, however, test the process first. There should be no reason to remove so much grout line surface that you would need to regrout.