IKOTherm Polyisocyanurate Foam Insulation?is designed to be part of modified bitumen, built-up, or single-ply roof systems. IKOTherm Polyiso is composed of a select kraft paper reinforced with fiberglass strands for high strength and excellent absorption for both hot mopping and adhesive attachment methods. The product also performs well with mechanical fasteners. IKOTherm is a rigid, polyisocyanurate foam insulation with high thermal properties, which provide outstanding insulation protection and help to reduce heating and cooling costs. Lightweight and easy to handle.