Zap Professional Restorer concentrate effectively removes rust, dissolves hard water stains, and eliminates calcium buildup, lime scale, soap film, and dirt. Specially formulated for use on porcelain, fiberglass, ceramic tile, and grout, this powerful solution restores surfaces to a like-new appearance. Ideal for sinks, toilets, tubs, shower floors, RVs, and boats, it can be used at full strength for heavy stains or diluted for regular cleaning. The professional-grade formula is designed to penetrate deep into surfaces without scratching, providing a thorough clean for kitchen and bathroom floors, counter tops, and more. All items are in excellent used condition unless noted.