Like our SBS products, our APP membranes provide unsurpassed tensile strength while maintaining criti­cal flexibility even in the coldest environments. However, with APP membranes (coated with a proprietary blend of asphalt and atactic polypropylene) con­tractors now have a more efficient mode of application by means of heat welding
 

The back coating of APP modified asphalt is heated  to a point where the bitumen acts as an adhesive, bond­ing the sheet to a substrate, and bonding the overlapping edges. Effectively, the product has a built-in, hot melt adhesive, making hot mopping unnecessary.

While all APP products are designed to be heat welded, selected products can also be applied in cold adhesive. These products, which in most applications may be heat welded, can also be applied with cold application adhesive.

Most of the APP membranes have a factory applied mineral surfacing (available in colors) and need no further protection from harmful UV rays. However, for various purposes, JM also provides smooth-surfaced APP membranes which must subsequently be protected from UV rays by the application of a compatible roof coating.

For additional information, contact the Regional Technical Services Manager who can be reached through the JM Regional Sales Office nearest you, or the Technical Services Specialists at the Guarantee Services Unit.