HG Wall and Floor Grout Protector (Product 13) 1L Super Protector for Wall and Floor Grout The optimum grout protector HG wall and floor grout protector makes grout absolutely water, oil, grease and dirt repellent. With our special grout protector, all grouting is protected quickly and in the best possible way. Grout is often porous, which means that it can absorb grease, dirt and scale very easily. Spilling wine, soft drinks or greasy things on floor grout will cause marks on the grout that are very difficult to remove. Wall grout, especially in damp spaces such as the bathroom, will become dirty and ugly due to mould and scale.