10 Best Basement Waterproofing Sealers 2025 in the United States

The Liquid Rubber Basement and Foundation Repair Sealant offers a comprehensive solution for those looking to waterproof their basements and foundations. It provides a robust, flexible coating that can prevent leaks and water damage effectively. With its 900% elongation capability, the sealant is designed to withstand structural movements and temperature changes without cracking, making it a reliable choice for long-term basement and foundation protection.

Ames Maximum Stretch is a versatile waterproof sealant that stands out in the basement waterproofing sealers category due to its elastomeric and rubberized properties. One of its key strengths is its impressive 650% elongation, which makes it highly elastic and resistant to cracking or peeling. This quality is particularly beneficial for areas that experience temperature fluctuations or structural movement, providing a long-lasting seal. The high light reflectivity (88%) also helps in reducing surface temperatures, which can lower cooling costs when applied to roofing. The sealant is non-toxic, eco-friendly, and has low VOC levels, making it a safe choice for indoor applications as well as outdoor use on various materials including metal and rolled roofs. The application method is flexible; you can brush, roll, or spray it on, accommodating different user preferences and project requirements.

Thompson’s WaterSeal Multi-Surface Waterproofer Stain in Clear is a versatile sealer that can be used on concrete, brick, and exterior wood surfaces. It provides a clear finish which allows the texture of the material to show through while protecting it from water damage. This product is easy to apply, making it suitable for various outdoor projects like patios, fences, and decks.