Xtreme Shield, The ultimate in liquid protection for your polished concrete master piece. Xtreme Shield when burnished into the concrete surface adds the luster to make the project pop while protecting and strengthening. Xtreme Shield Utilizes an acrylic polymer combined with Colloidal Silica for an extra layer of protection. Xtreme Shield ships concentrated for maximum economics and storage. Mix Ratio 2:1coverage: 1500-2000 Square Feet.