Carcotex/SP V-packings are usually fitted as rod seals in metal forging presses; in this case we supplied a piston seal 1,8 meter diameter for a large forging press; piston V-packings are not common in this kind of presses and they require long time for their replacement; this customer advised of a very large extrusion gap. We designed a special Carcotex/SP with self-aligning female adapter, which could stop leakage and extend dramatically the seal life.