Suitable for the treatment of smoothed stones. We also recommend PROTEX on sandy amorphous material mixed with the presence of silicate and calcium carbonate. After the application a light increase of color can be seen but depends on the type of stone and where the product is applied. Good resistance to outside conditions. PROTEX gives protection against stains and does not create superficial films. Colorless liquid dries in 30 minutes. Water repellent after 24 hours.