IKO Powergum Quadra is a high performance, fire resistant, roofing membrane consisting of a polyester/glass composite carrier, enhanced with a layer of expandable natural graphite crystals, and coated with a high performance APP polymer modified bitumen. IKO Powergum Quadra also incorporates a diamond shaped coating on the underside of the membrane which is applied using heat activation, and subsequently permits the membrane to act as a vapour diffusion layer. This results in a bonding area to the substrate of approximately 40%, providing both excellent wind uplift resistance and vapour diffusion. The underside of the roofing membrane is printed with a thermofusible film, and the top surface is finished with a dark grey mineral slate.