Used primarily for exterior stone surfaces including marble, granite, limestone, slate and cement based building products as well. Suitable for clay pavers and roofing tiles. Does not darken most surfaces. Solvent based is normal. There are some new emulsions available which can comply with VOC restrictions.
Performance is poor and short lived.
Not recommended for most building stone. These are proprietary products which repel oil as well as water and other liquids. There are a number of these specialized products designed for use on stone surfaces. They include Tung , Linseed and Soy. These oils become solid as they dry and are of potential use for sealing stone surfaces.