W.R. Meadow's LIQUI-HARD ULTRA is a molecular concrete densifier and chemical hardener. The ready-to-use, colorless liquid hardens and dust proofs concrete at a molecular level. LIQUI-HARD ULTRA is sprayed on and then left moist on the surface for 20 minutes while it penetrates into the surface. The product does not require brushing or rinsing. LIQUI-HARD ULTRA can be used with BELLATRIX and INDUROSHINE.