https://www.alumascroofing.co.uk/products/waterproofing/bituminous-membranes/derbigum-flat-roof-membranes/

All Derbigum bituminous membranes within the Alumasc Roofing range are 100% recyclable using the Macalusor® technique – a unique bitumen waste processor, recycling roofing off-cuts and bituminous waste.