Granite Gold Grout Cleaner Spray quickly and safely cleans grout, natural stone and tile (porcelain, ceramic, and glass). It is strong enough to remove grease, oil, dirt and soap scum, yet, it is a non-acidic and non-abrasive intensive cleaner that will not damage or discolour the grout itself. The lightly "citrus-scented" Granite Gold Grout Cleaner formula is ready to use, biodegradable and safe on coloured grout.