SoySeal Non-Toxic Concrete Sealer, 4 Gallons Natural Soy Products Biodegradeable Concrete Sealer in a case of 4 gallon containers. Soy-based SoySeal concrete sealer effectively seals and waterproofs most porous masonry surfaces such as concrete, brick and natural stone. Protection against moisture, some staining liquids and color damage from exposure to the sun. Note Picture Depicts Only Size of Gallon Containers. Ready to Use. Note Some sprayers may require adding water to get proper spraying. No V.O.C.’s, Non Flammable, Exceptional performance. No toxic fumes. Environmentally safe. Made in USA. Directions for Use For best results, use at temperatures between 50 degrees F. and 90 degrees F. Do not allow to freeze as product could lose its effectiveness. Shake or agitate contents for at least one 1 minute before mixing with water. Once product has been mixed with water, solution should be stirred or agitated prior to use Spray, roll or brush an even coating on to a clean, dry surface. Do not let Concrete Sealer pool on the surface. Do not allow traffic on the surface while concrete sealer is drying to avoid possible slippage hazard. Allow up to 48 hours for full dry time. If the day of application has a low relative humidity a faster drying time may occur. Note In the event the surface is not completely dry after 72 hours, rinse off excess concrete sealer with water. This item ships from a separate warehouse and may require extra time for delivery.