55 Gallon Drum Soy-Based Non-Toxic Concrete Sealer from Natural Soy Products 55 Gallon Drum of Natural Soy Products Biodegradeable Concrete Sealer. SoySeal Concrete Sealer designed and created for effective sealing and waterproofing most porous masonry surfaces such as concrete, brick and natural stone. Concrete Sealer is designed to provide the ultimate in protection against moisture, some staining liquids and color damage from exposure to the sun. Ready to Use. Note Some sprayers may require adding water to get proper spraying. Natural Soy Products SoySeal Concrete Sealer Product Details No V.O.C.s, Soy based Non Flammable, Exceptional performance User friendly, 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 prior to mixing with water. Once the product has been mixed with water, solution should be stirred or agitated prior to application. Spray, roll or brush an even coating on to a clean, dry surface. Do not let Concrete Sealer to pool on the surface. Do not allow any 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.