Polyurethane-based elastomer with excellent qualities of resistance to abrasion and tearing. Excellent mechanical characteristics with a high breaking load - 2 to 4 times higher than normal tires. Variations in temperature do not alter the qualities of the material which, when brought back to room temperature, keep them unaltered. It resists aging due to oxygen, ozone and oils in general, chemical agents, synthetic mineral greases, diesel fuel and lubricated mineral oils without additives. It is possible to obtain membranes and flat gaskets with very thin thicknesses up to 0.3 / 0.4 mm.