25mm butyl rubber stopper
25mm butyl rubber stopper can be of different shapes depending on its exact purpose, although we generally know why rubber stoppers are so important. Some of the most common shapes in which you can find butyl rubber stopper are solid stopper, then types with one or two holes, plugs, end caps and many others. Each of these types of rubber stoppers has a very wide application. For example, rubber stoppers with one or two holes are primarily used in laboratories. The reason is that you can put a thermometer or some other measuring device through the hole, without having to remove the stopper and thus come into contact with chemicals. The two-hole version allows you to put multiple devices at the same time. It can be of different sizes, and it is important that it is perfect fit so that the chemicals do not evaporate, so many people buy a 25mm butyl rubber stopper because it is one of the common sizes of laboratory containers.
If you are wondering why rubber stopper is made of Butyl rubber which we often come across under the acronym IIR the explanation is very simple. Butyl rubber is a synthetic rubber that has many characteristics great for laboratory conditions, but also for use in other industries. Due to its low gas permeability it is ideal for the laboratory, but also because Butyl rubber is very durable and resistant to tears and other types of damage.
It is classified as suitable both for the explosives industry as well as for the production of gas masks. Since it can withstand flexing, high temperatures and other conditions that are potentially hostile, then you can find Butyl rubber in both the sports and music industries. In general, you may now have a 25mm butyl rubber stopper around you without even knowing it, because rubber stoppers are also used in households.
Our Butyl Stoppers Size Chart
Bottle Stopper Size Catalog
Compare the listed butyl stopper dimensions against the bottle opening and seating arrangement. Confirm the selected profile using the part drawing.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
Butyl Rubber Stopper(Anaerobic bottle stopper)
Compare A, B, C, D and E in mm against the selected stopper drawing. The illustration shows a related profile; confirm the precise underside and fit before specifying the part.

Need a different size? Share your drawing, mating dimensions and intended use to discuss a suitable part.
Discuss Your RequirementsProduct specifications
- Product form
- Vial or bottle closure matched to its neck finish
- Material
- Butyl rubber. Specify the compound grade for the selected service.
- Application focus
- Laboratory vessels. Size the part against the selected assembly.
- Dimensions to confirm
- Vial neck bore, sealing flange, plug depth and any crimp-cap interface. Match these to laboratory vessels.
- Nominal size reference
- 25mm. Identify what each nominal value measures and confirm all mating dimensions and tolerances.
- Contact conditions
- Other gases: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
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