About This Superior Adhesion and Sealing Power: Xmntdo Waterproof Sealant is designed to bond tightly to a wide range of surfaces, including metal, wood, and concrete. It effectively penetrates cracks, seams, and leaks, creating a durable, waterproof barrier that keeps air and moisture out. Perfect for both indoor and outdoor use Exceptional Flexibility & Durability: The liquid sealant boasts over 1000% elongation, allowing it to flexibly adapt to surface movements and prevent cracking or peeling, and is UV Stable stopping the sun from degrading the product, ensuring long-term waterproof performance for both indoor and outdoor use User-Friendly, Safe & Easy to Apply: Waterborne formulations and polyurethane emulsions material, safe for humans and pets. It's easy to apply with a brush, roller, or even by pouring, after drying comes a waterproof layer. With our sealant, you can tackle your waterproofing projects with ease and confidence Polyurethane Waterproof Coating Coverage: The white flexible sealant each 1Gal (3.78 L) covers approximately 30 sq ft/2.8 sq m (depending on the surface material and thickness of the application), forming a strong and durable waterproof layer that can effectively resist UV rays, extreme weather and daily wear and tear Versatile Use for Multiple Waterproofing Applications: Ideal for roofs, metal, wood, concrete, and more. Use on flat roofs, sloped roofs, planter boxes, metal roofs, basements, planter boxes, RV roofs, and other surfaces for complete waterproof protection Waterproof Insulated Sealant Application Suggestion: Low temperatures can lead to a long curing time for waterproof coating sealant, and it is recommended to use above 10℃/ 50℉ (including overnight temperatures), full curing requires 24-48 hours (depending on the thickness of the coating and environmental conditions); After construction, ensure proper ventilation and avoid contact with water or other liquids until the coating is fully dry Overview Material : Polyurethane Brand : Xmntdo Style : 5 Gallon Item Weight : 640 Ounces Item dimensions L x W x H : 1 x 1 x 1 inches