SureMB 120TG Base is a smooth-surfaced, torch-grade SBS base ply, reinforced with a non-woven polyester mat that is saturated and coated with high-quality asphaltic bitumen and SBS elastomers for easy maintenance, durability and flexibility. This product is designed for use as a base ply or inter-ply in Carlisle's multiple-ply system and may be used as an vapor barrier, air barrier or temporary roof (for up to 60 days).