Derbibase Smooth Surfaced APP Modified Bitumen Base & Ply Sheet Ultra comes with below features:

• High quality smooth surfaced APP Modified Bitumen Roofing Membrane designed as a base or ply sheet
• Derbigum's exclusive blend of APP (atactic polypropylene) polymers and select asphalts enhances the weathering capabilities and UV resistance of the membrane
• Mid reinforced with a fiberglass mat that increases the membrane's strength and durability
• DERBIBASE Ultra is a completely water-proof base ply for field and flashings when side and end laps are heat welded
• Product can also be applied with PERMASTIC Cold Adhesive or mechanically fastened