Glass rubber stopper

Glass rubber stopper also known as laboratory rubber stopper, rubber bung and a rubber cork is most commonly used in laboratories to close test tubes and other places where there are chemicals and similar substances that must not evaporate because they can be toxic and because they can lose their characteristics. Glass rubber stoppers are ideal to get a tight seal very easily because with the help of a glass rubber stopper of the appropriate size, the entrance to any glassware will be completely closed and you will know that both you and the substances are safe.

They are not only used for laboratory purposes, but are also used in other places, most often in wineries. Glass rubber stoppers can be used for the fermentation process and are therefore popular in wineries. They can also be used for fermentation of other types of food and drinks, if the fermentation takes place in glass jars and bottles. In this case, it is important that the glass rubber stopper be of a specific type of rubber that is suitable for contact with food. Natural rubber and silicone rubber are recommended for food contact, while even more durable rubber types such as FKM are used for laboratory use. FKM has high chemical stability and can therefore be used in environments where chemicals, acids and other highly abrasive agents are present.

The sizes in which you can find glass rubber stopper vary greatly because laboratory glassware as well as winery equipment can be found in a wide variety of sizes. That’s why we adjust the size of the glass rubber stopper, so that it can be a perfect fit for every type of flasks, test tubes and so on. Whether used in the laboratory or in the fermentation process, the glass rubber stopper must be a perfect fit so that chemicals do not evaporate or the fermentation process is stopped. So if there is no available size you need, order a custom glass rubber stopper.