This universal fermentation stopper is made from quality PVC and is designed for demijohns and other vessels. Thanks to the hole for an airlock/fermentation tube (glass or plastic), it allows controlled CO2 release while preventing the ingress of impurities and air, supporting a stable fermentation process.
Before first use, wash the stopper thoroughly with warm water and dish soap to remove the manufacturing silicone layer and ensure a flawless fermentation start. Thanks to the material’s flexibility, the stopper easily adapts to the necks of various containers and can serve both as a sealing closure and as a stopper with an airlock.
