Count on IKO for the best in premium heavy-duty composite roofing systems. IKO Premium Heavy-Duty (HD) Composite Roofing Systems include a tough composite reinforcement of non-woven polyester strengthened with a glass fiber scrim in both machine and cross directions. These HD membrane products are offered throughout the full line of asphalt systems. They include Fast-N-Stick™, Torchflex and PrevENt™ membranes, as well as the new eco friendly Carrara™ ArmourCool HD. These membrane roofing systems are built extra tough to last longer.