Dirty Stone Clean and Seal Stone & Grout Posted on September 19, 2008 by TonyDannucci This stone is in need of cleaning and sealing. It has suffered years of abuse. There is an accumulation of deep down dirt and grime. This stone floor is in need of a deep cleaning. This is not bad for a first pass of our cleaning equipment. The owner wasn't sure if it really need cleaning??? On our way to a clean stone. Clean and ready for a good application of sealer!