Recommended for daily use on porcelain, metal and ceramics.
Theochem Laboratories Safe-T-Bowl Liquid Toilet Bowl Cleaner, 32 Oz. Application: bowl cleaner; applicable material: ceramics; enamel; metal; dirt types: grime; mildew; mineral scale, mold; organic matter; soil; scent: unscented. recommended for daily use. Mild, non-acid formula ensures safe yet highly effective performance.