rubber flask stopper

A rubber flask stopper is a cylindrical item that is meant to be placed inside glass lab containers, like flasks for example. They are a really important piece of equipment because they let you control the experiment properly, and because of the sealing effect that they cause. If you have certain volatile substances, it is required to have such a stopper to avoid toxication and prevent the chemical to be compensated. 

They come in various options, depending on what you need them for. Firstly, we have completely closed stoppers that are meant to be used for sealing purposes. Secondly, we have the ones that come with one hole. They come in handy when you have to measure the exact temperature during the experiment or measure the pH value. Lastly, we have the flask stoppers with two holes. They are meant to be used for closed systems where one substance comes from the first hole, and a second substance goes away through the second hole. You can choose the right option depending on your needs. However, if you are not sure what you will use them for, you can get closed stoppers and drill them later on if needed. 

The material that lets them be used in such scenarios is rubber. It can fit snugly in the neck of the flasks and offers sealant effects. In addition, there can be special rubbers made to withstand all the chemicals so they don’t damage quickly. Heat resistance is another benefit that this material has, so it can be reused when sterilized properly using an autoclave. However, to be able to use the rubber flask stopper, you will need to get the correct size. That is why is it important to get the right dimensions of the holes on your flasks and find them on our list. In case you have a different request, our firm can produce special flask stoppers for your project.