Lithi-Tek LS 9500 Ultra Concentrate - 1 Gallon Penetrating Concrete Sealer, Waterproofer plus Densifier An industrial-grade, water-based, proprietary sealer designed to densify, strengthen and waterproof concrete: increasing abrasion resistance while reducing moisture and vapor intrusion Prevents the growth of mold, mildew, efflorescence Reduces hydrostatic pressure, water vapor transmission, moisture intrusion and ASR Increases concretes abrasion resistance and strengthens concrete up to 50% Available in an industry first ultra-concentrate, 1 gallon of Lithi-Tek 9500 mixes with 4 gallons of water to make 5 gallons of sealer that will treat up to 1000 sq. ft. of concrete per coat.