Maxi Project APAO Single Layer Mineral Overlay membranes are new generation APAO (Amorphous Polly-Alpha-Olefins) membranes, specifically formulated by Sappi to provide the ideal solution for re-roofing of mineral finish roofs. 
One of the best quality and most versatile modified bitumen membranes on the market Maxi Project Mineral Overlay membranes are simply “built stronger to last longer”, providing the best combination in terms of reinforcement, thickness, and compound formulation.
With 4mm plus mineral for a 15 year guarantee and 5mm plus mineral for a 20 year guarantee.