Ultra Lightweight Underlayment - Spex•Crete™350

Spex•Crete™350 Ultra Lightweight Underlayment (ULU) is non-structural lightweight underlayment that has been designed for floors with strict weight constraints. Adding only ~3 pounds per square foot at 1", SpexCrete 350 is the right choice for your next deep fill flooring project.  SpexCrete 350 ULU is easy to pump, place, and finish. As compared to foam board, this system will potentially save you both time and money on your next flooring job!