Hasa 77041 1 gal Bottle Gysar "F" Tile Brite 4 per case. Gysar 'F' Tile Brite was developed especially for the pool service professional. The thick, opaque gel – like tile cleaner means one application of Gysar 'F' Tile Brite to your brush is all you will normally need to completely clean an average residential pool’s tile. Gysar 'F' Tile Brite is an excellent tile cleaner by itself but it can be mixed with muriatic acid to become a very effective way of removing oils and scale buildup. For use with muriatic acid: Gysar 'F' Tile Brite can be used on it's own or mixed with muriatic acid. Mix a proportion of 1/4 muriatic acid and 3/4 Gysar 'F' Tile Brite in a bucket large enough to accommodate a tile brush or applicator. Gysar 'F' Tile Brite adheres well to fiber or plastic tile brushes, sponges, or plastic scrubbing pads.