Smooth Start, a new self-leveling underlayment from TEC Specialty Products, is designed to level from featheredge to 1-inch deep in a single pour, producing a uniform finish for all types of interior floor coverings, the company says.

Smooth Start is recommended for leveling concrete and cementitious surfaces, cementitious backer units, exterior-grade plywood, and oriented strand board. Smooth Start is packaged in 50-pound, moisture-resistant bags