The intent of conservation treatment is to restore the structural integrity to the crumbling, decaying masonry, OH Consolidation Treatment is based on silicic ethyl esters. Their extremely small molecular structure enables then to penetrate deeply into deteriorated masonry surfaces, collecting at contact points between individual stone grains. An internal catalyst and atmospheric humidity then converts the liquid consolidant into a glass like silicon dioxide (siO2) gel which binds the stone particles together. Exhibiting chemical characteristics which are virtually identical to that of the natural stone, the newly deposited SiO2 cementing matrix replaces the stone’­s natural cement, which has been lost due to weathering influences