Latapoxy SP-100 Stainless Epoxy Grout from Laticrete was recently tested according to the ISO 10545-14, Ceramic Tiles Determination of Resistance to Stains. The grout was covered with staining agents including red and green pigment pastes, iodine and oil. After 24 hours, a series of cleaning methods were performed to determine if and how easily the stains could be removed. On a scale of one to five, five being the highest rating, the grout scored either four or five in all the cleaning methods.