Nomacorc Corks. Highly elastic, polymer-based synthetic #9 by 1.5 inch wine corks manufactured by a patented extrusion process, resulting in a small, uniform, closed-cell structure that acts as a superior long-term barrier to oxidation and leakage and will never mold or taint. Like other synthetic corks, Nomacorcs will not impart off-flavors to wine, and will not break or disintegrate. Normacorcs insert and remove smoothly and allow for upright or horizontal storage of bottles immediately after corking. Any type of corkscrew can be used to pull a Nomacorc, but we recommend a corker with an iris mechanism (like our floor corker) for best results when inserting Nomacorcs in bottles.