SureMB 120TG Base is a smooth-surfaced, torch-grade SBS base ply reinforced with a fiberglass reinforcement mat that is saturated and coated with high-quality asphaltic bitumen and SBS elastomers for durability, flexibility and easy maintenance. This product is designed for use as a base ply or inter-ply in Versico's multiple-ply system and may be used as an air barrier, vapor barrier or temporary roof.