Anderson TorchSafe T.A. Underlay is a heat-activated/self-adhesive glass reinforced SBS-modified bitumen membrane with special vapour control stripes. It is intended for use as an underlay/base layer in a bitumen built-up roof system.Performance DataSurface Upper: Thermofusible film, with SBS bitumen with release sheet to overlap selvedgeSurface Lower: Silica sand with SBS-modified bitumen adhesive stripes with release sheetMaterial: SBS-modified bitumen adhesiveType of Reinforcement: Glass SelvedgeWidth: 75mmTypical Thickness: 3.6 mm 0.2Roll Weight: 28kgFeaturesUnique grooves systemSelf-adhesive side laps protect the insulation during installationTechnically advanced low heat-reactive bitumenThermically Activated membranes to protect combustible surfaces from naked flamesExceptional bond strengthReduced energy consumptionTorchSafe requires 50% less torchingStriped resinous profiles release water vapour to help eliminate blistering and prolong roof life