Grout & Tile Cleaning

The Wet Sponge Test for Identifying Absorbent Natural Stone Tiles

The science of stone capillaries The wet sponge test for stone porosity identifies how quickly a natural material absorbs liquids by monitoring the darkening of the surface over several minutes. This simple diagnostic tool determines if a stone requires immediate sealing to prevent permanent staining from grout or household spills. I have spent twenty-five years […]

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