Liberon natural finish stone floor sealer is a highly effective sealer for protecting interior terracotta slate york stone ceramic marble and many similar types of porous stone flooring it is a water based product and makes the surface resistant to water stains food oils and grease marks it is ideal for use on new or old stone and is effective after just one coat on most surfaces natural finish stone floor sealer is non colouring and maintains the natural look of the stone effective after just o