This solvent based sealer for stone is made by Tenax in Italy and in tests this product represents the best value for sealing natural stone. It tested very good for granite (including the exotic granites), and it works on limestone, sandstone, terrazzo, concrete agglomerate, and even engineered stone. Tenax states that you can get 200 - 300 square feet of coverage per liter of Proseal! The product must be evenly applied on dry and clean materials. The presence of water, dust or dirty matter may influence the result regarding the uniformity of the surface. We suggest to spread the product using a brush, sponge, cloth or through a spray gun. Use the right quantity that the material naturally can absorb. Then, after few seconds, clean (buff) the surfaces by a cleaned cloth. The excess may create a superficial sticky films, so the excess must be removed immediately after the application. We suggest to repeat this treatment after 10-15 minutes from the first application. The effect of anti stain will be achieved after 24 hours from the treatment. In case of floor application, do not walk on the surface before. IMPORTANT: when a surface is treated for the first time, we suggest to test PROSEAL on a small hidden part for testing the effect. After usage, close the tins well sealed. This is a HazMat (hazardous material). It can only be shipped via UPS Ground Delivery to the continental USA or UPS Standard Delivery to Canada. It is not able to be shipped via any other level of service or outside of the continental USA and Canada. Ships to CONTINENTAL U.S.A. and Canada only-- it is not available for delivery to Alaska or Hawaii.