Clear solvent based siloxane consolidating agent for protection of buildings and stones against penetration of water, grease and humidity. Optimal performances on polished material, it lets the stone breath; does not allow the efflorescence to exit from the stone, it penetrates deeply into the stone, does not change the original color of the treated stone, does not make any film but catalyzes into the stone giving a very good protection. Tests carried out in laboratories demonstrate resistance to UV rays. The stone treated does not change its color after long exposure to UV rays. Strong 2000 is perfectly invisible and does not give a wet look or shine to the treated material, but maintains the original aspect of the stone. It prevents formation of mildew.