The image shows rolls of Bitumax APP Polyester Grey Mineral Waterproofing Membrane, which are torch-on bitumen sheets used for sealing roofs and stopping leaks.Product DetailsMaterial: Plastomeric modified bitumen reinforced with polyester.Finish: Grey mineral slate surface with an embossed pattern and square grid design.Specifications: Commonly available in thicknesses around 3.5mm to 4mm with a weight of about 4.5 kg per square meter.Dimensions: Standard rolls measure 1 meter wide by 10 meters long.Common Uses: Waterproofing flat or sloped roofs, terraces, foundations, balconies, and wet areas like swimming pools.