Bostik 50 lb. SL-175 Premium Self-Leveling Underlayment & Wear Layer, $42.99 USD/Box, LL Flooring (Lumber Liquidators)

Bostik's 50 lb cement bag, SL-175, is a high-quality, self-leveling underlayment great for creating smooth surfaces before floor installation. Its extended working time and excellent leveling make it suitable for various applications. SL-175 can also serve as a tough wear layer. When you want a raw concrete appearance, it can be enhanced with stains and dyes. Features include quick readiness for foot traffic, adjustable thickness, and compatibility with mold treatment. Perfect for pumping applications, it works as both underlayment and wear layer, can endure regular construction, and contributes to LEED® projects. Suitable for 'green concrete,' it meets current elevations seamlessly, thanks to its advanced calcium aluminate formula with 21% recycled content.