CLEAR-FUSION™ Vlow maintenance protective coating presents an economical and convenient do-it-yourself hand-applied protective coating for glass and silica-based surfaces to help make them more stain-resistant,. This clear liquid seals and protects countertops, tile, sinks, toilets, mirrors, shower doors, and windows from mineral and soap scum build-up. It makes maintenance easier, reduces cleaning time and effort needed, and eliminates the need for harsh chemicals. 4 oz. will treat up to approximately 236 square feet. Tip:It is recommended to apply Clear-Fusion™ V low maintenance protective coating to larger areas starting from the bottom of vertical surfaces first, working it into the surface in overlapping circles, and then continuing upward. This will help ensure a streak free coating.