TamSeal 4000E is a 4.5 kg APP Modified Torch-Applied Bituminous Waterproofing Membrane. The surface is mineral slate, coated on a heavy duty high strength, nonwoven polyester mat. The mineral slate provides excellent UV protection and is suitable for light pedestrian traffic. The rigid nature coupled with excellent UV resistance of the membrane provides for long weathering and maintains the properties for an extended period of time.