IKO Systems Underlays are for use as vapour control layers for adhered IKO Polymeric roofing systems that can be applied in a range of ways.
Systems T-O Underlayer (Torch-on) consists of a polyester carrier coated with SBS rubber modified bitumen. The upper surface is finished with fine sand and the lower surface has a sacrificial film which rapidly melts during the torching operation.
Systems S-A Underlayer (Self-Adhesive) is an elastomeric self-adhesive underlayer incorporating a robust polyester reinforcement for greater durability, coated with SBS modified bitumen. The product has a smooth upper surface that forms an ideal surface for bonding thermal insulation.