Black Diamond Stoneworks" Granite Polish Preserver protects counters, walls, bar tops and all Marble and natural stone surfaces. Our formula makes it easy and convenient to use; simply spray and wipe to preserve your stones natural finish. Our advanced formula will not build up or require stripping. Once applied, Polish Preserver resists etching and water spots making it a must for shower walls. It also will help prevent shower wall streaks and soap scum build-up. With regular use, Polish Preserver will help maintain your stones factory polish and protect it from spotting, streaking and staining. Made in USA.