This closed-cell, rigid foam insulation is made from recycled materials. Also referred to as polyisocyanurate, it’s a thermoset plastic ideal for use in roofing, walls and ceilings. It exhibits superior shape retention at extreme temperatures than standard polyurethane insulation.
Polyisocyanurate (also known as Polyiso and PIR) comes in bunstock to make pipe insulation or for other custom insulation jobs. It can also come in come in sandwich boards for use in building insulation.