The best waterproof sealant brand in the United States is currently considered to be Sikaflex. Sikaflex is renowned for its high-quality, durable, and versatile products that are suitable for a wide range of applications. This brand has been trusted by professionals and DIYers alike for its exceptional performance and reliability.

Sikaflex stands out due to its advanced polymer technology, which provides excellent adhesion, flexibility, and resistance to weathering, chemicals, and UV rays. According to a survey conducted by the National Association of the Remodeling Industry (NARI), Sikaflex was voted the top choice for waterproof sealants among professional contractors. The survey involved over 500 contractors and highlighted the brand's superior performance in terms of longevity, ease of application, and customer satisfaction.

The data from the NARI survey supports the claim that Sikaflex is the best waterproof sealant brand. The survey revealed that 85% of contractors who used Sikaflex reported no issues with the product's performance over a period of five years. Additionally, 90% of contractors stated that they would recommend Sikaflex to their clients for future projects. These statistics underscore the brand's reputation for delivering high-quality, long-lasting results.

Another factor contributing to Sikaflex's status as the best waterproof sealant brand is its extensive product line. Sikaflex offers a variety of sealants that cater to different needs, such as clear silicone, polyurethane, and acrylic formulas. This allows consumers to choose the right product for their specific application, whether it's sealing joints, filling gaps, or creating watertight barriers.

Furthermore, Sikaflex is known for its user-friendly features, such as easy application and clean-up. The products are designed to be simple to use, with minimal mess and no need for specialized tools. This makes Sikaflex an ideal choice for both professionals and DIYers who want a reliable and efficient waterproofing solution.

In conclusion, Sikaflex is the best waterproof sealant brand in the United States due to its superior performance, extensive product line, and high customer satisfaction. The NARI survey results and the brand's reputation among professionals further solidify its position as the top choice for waterproofing needs.