The Isogum products manufactured in the Eshtehard unit of Iran Fiberglass Company with 2 to 5.5 millimeters of thickness, consists of a layer or two layers of strong carrier that has been integrated with polymer bitumen. Depends on the usage of this layers, they are with different features from the kinds of 60 to 120 grams and Thermo band polyester or needle-like (non-woven). In order to modify the tar and its physical features to create the desired features in the final product, modifier SBS, APP with other Compounds is used. The Products containing SBS(styrene-butadiene-styrene) called type S of Isogum, and the products that APP (Atactic Polypropylene) is used in their tar compounds, called type A of Isogum with BPP standard. In order to reduce the damaging effects of the sun's UV rays and mechanical damage to the installed product, and sufficient separation the layer of rolls before installation, Pebble and flake coatings (Slate flake), silica, talc powder or aluminum foil is used.
This insulator could be used in all kinds of the surfaces. The existence of the foil layer makes it suitable to use it in the vicinity with environmental erosion, such as the sun.