The 1000mm X 16m Torch On Sanded Underlay Bicroelast HMP SBS is a high-quality waterproofing membrane designed for flat and pitched roofs. Made from thermoplastic elastomer modified bitumen, it offers superior durability and weather resistance. Its sanded finish ensures an excellent bond with the torch-on cap sheet, making the installation process easier. Its a top choice for professionals seeking reliable roofing solutions.