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Lythic Densifier with reactive colloidal silica is 99.5% pure silica, suspended through a proprietary "green" manufacturing process in an ultra-low surface tension liquid. It reacts with concrete to increase surface density, making it less permeable to liquids and improving impact and abrasion resistance. Lythic's nano-sized silica particles (3-5 nano-meters) not only react with lime, but also bond directly to silica already in the concrete. Reactive colloidal silica bonds and hardens decorative cementitious overlays that are low-lime and do not react well with sodium, lithium or potassium silicates. 1 gallon will yield 5 gallons of product when diluted 4:1 with water, will cover 300-500 ft per gallon.