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APP Modified Bitumen Roofing Membranes

Johns Manville has developed formulations that enhance the asphalt's overall weatherability by modifying premium-grade asphalts. By combining these modified asphalts with non-woven polyester or glass fiber reinforcements, JM produces waterproofing systems that exhibit tremendous strength, elasticity and weatherability.

APP roofing membranes provide superior tensile strength while maintaining critical flexibility – even in the coldest environments. Additionally, with APP roofing membranes (coated with a proprietary blend of asphalt and atactic polypropylene), contractors now have an efficient mode of application by heat welding, making hot mopping unnecessary.

Systems Technical Data

Find data sheets, codes, specifications, and other useful documentation by rolling over and following the links below.

Submittal Wizard™

Use the quick and simple Submittal Wizard to select the high-performance Johns Manville products you need for your next roofing project and create a submittal package.

To get started, choose between a Cold Applied or a Heat Weldable APP system and select the documents you need from the System Components and System Application tabs. Once you’re done, the Submittal Wizard will compile your submittal package and email you a download link for it.

APP Modified Bitumen Roofing System


JM is the exclusive source for dibiten APP membrane. This heat weld applied modified bitumen membrane is a high performance solution for both commercial and residential applications. Dibiten is currently available in the Pacific region.

APPeX® 4.5M FR (2CIN-W/2PIN-W)

The APPeX products provide just the right torch-ability across a wide range of temperature situations and a variety of rooftop conditions. JM APP solutions are known for their ability to remain flexible at low temperatures, resist cracking, blistering, UV damage and oxidation. For more information view the APPeX brochure here.

Product & Sales Information: (800) 654-3103