DRYLOK® natural look sealer is a non-yellowing protective coating that can be used as a sealer or concrete curing membrane. As a sealer, DRYLOK® natural look sealer penetrates deep to seal and protect masonry against acids, alkalis, road salts, de-icing compounds, household cleaners, gasoline, oil and weathering. Protects against dusting, staining and spalling. As a concrete hardener, When applied to freshly poured concrete, after the surface has set for 24 hrs and excess water has been removed, DRYLOK® natural look sealer will control water evaporation resulting in maximum concrete hardness.