Seismiclean Grout Restore is a heavy-duty professional strength cleaner that will take years of grime off of your grout, restoring it to it’s original color! This economical cleaner produces amazing results without the messy leftover residues! Make stubborn stains disappear with Seismiclean Grout Restore! Dilute with water into a spray bottle, apply to grimey, filthy, dark grout surfaces and allow for 10 minutes active surface. Using a hard bristled scrub brush lightly agitate soiled areas before wiping or mopping up with warm soapy water. Use a ratio of 1:4 for light/general cleaning and up to 1:2 for caked on jobs! Always use caution and proper safety measures while using this product. Use in properly ventilated area, wear gloves and safety glasses/goggles.