Cheng Concrete Sealer 500 Ml Food-safe + Water-based + Non-toxic = CHENG Concrete Sealer, Coverage = 30-40 Sq Ft Ideal for Concrete Countertops, Integral Sinks, Fire Places, and Furniture Hybrid Technology that Penetrates Deep into the Concrete Leaving a Lustrous Surface Finish WINTER FREEZE WARNING: This product should not be frozen, please DO NOT order into freezing areas Overnight shipping is recommended in winter for cold climates