Stonecare4U Ultra Cleaner Pro is a professional heavy-duty cleaner suitable for use on ceramic, porcelain and many other types of natural stone surfaces, including polished marble and limestone. It contains a combination of agents which are very effective in dissolving ingrained dirt, wax layers, grease and many other stains or coatings. Important note: Protect painted or varnished surfaces with a masking material prior to use as this product may cause damage to sensitive surfaces. Always test the product in an inconspicuous area prior to use.