The main difference would be the application method. Each has its own advantages. Liquid applied membrane can take any profile of the concrete surface, while waterproofing membrane sheet is consistent in terms of membrane thickness and characteristics. Aquaflex Roof, Plastimul PU and Purtop Easy are examples of Liquid Applied Membrane. Mapethene TA, Mapethene HT SP, Mapeproof AL AP and Spider P are examples of Sheet Membrane.