Star Mineral Blended Densifier (55 Gal Drum) combines advanced lithium silicate with colloidal silicates to create an economical densifier that hardens, densifies, and dust proofs concrete and other porous silicious materials. Star Mineral Blended Densifier penetrates and reacts to become a permanent part of the concrete, so it doesn't peel or wear off. Easy, no-rinse application, no noxious odors or fumes.