Bostik SL-175 Premium Self-Leveling Underlayment & Wear Layer (50 lb.) is a high-performance, cement-based compound designed to quickly level and smooth interior subfloors prior to the installation of finished flooring. Engineered for strength and durability, SL-175 can be used as both an underlayment and a wear layer, providing a flat, hard surface suitable for a wide range of floor coverings including hardwood, tile, LVP, and carpet. Its self-leveling formula flows easily to fill low spots and imperfections, while delivering excellent compressive strength and long-lasting performance. Ideal for residential and commercial applications, this fast-setting product helps streamline installations and ensures a professional, even finish every time.