15mm silicone stopper
The 15mm silicone stopper that you can find in our selection is manufactured from high-quality and durable materials, which means that it will last for a really long time, without being influenced by external factors such as wear and tear, vibrations, movements, and shaking. Because of these properties, they can be utilized for a wide range of processes and applications. The most common thing different industries choose to use our 15mm silicone stopper for is for sealing purposes. Hence, if applied to an opening of a component, tube, flask, or surface, it’ll create a tight seal that will prevent air and other contaminants from influencing the substance inside.
Some of the things that our 15mm silicone stopper can resist include oils, some acids, humidity, dust, grime, UV lights, sunlight, as well as airborne particles and contaminants, which basically means that they can prevent these things from influencing and changing the smell, taste, and color of the substances underneath the stopper. Besides being resistant to these things, it can also resist extremely high temperatures (up to 232ºC/450ºF), as well as extremely low temperatures (-62ºC/-80ºF). Because of these characteristics, our small 15mm silicone stopper can be used across different industries, with the most common ones being the automotive, marine, and military industries.
As we previously mentioned, our 15mm silicone stopper is incredibly durable and strong, but this does not mean that it is not flexible and soft. Because it is, our customers will not have a problem with installing it on different openings, meaning that they will not have to use additional tools or adhesives for securing them in place. The only thing that you must make sure of is that it suits the opening you need to seal. If you cannot determine which silicone stopper is suitable for your needs, our customer support team can help you make a good decision.
Stopper & Plug Size Catalog
Compare four stopper profiles and check the selected part dimensions against your opening and available depth. Each profile has its own drawing and dimension meanings.
Custom colors are available to your Pantone color code. Include the code in your inquiry.
RST T-Shaped Plugs
Match stem diameter A, flange diameter B, stem length C and flange thickness D. E refers to the underside recess; use the selected row and approved drawing to confirm the actual profile.

RSA Tapered Corks
Compare large-end diameter A, small-end diameter B and Height, in mm. The mating bore and required seating depth determine where the taper contacts the opening.

RSB Undercut Plugs
Compare neck diameter A, flange diameter B, flange-to-lip distance C and flange thickness D. Check panel thickness and rear clearance. E refers to the underside recess.

RSD T-Shaped Stoppers
Compare stem diameter A, flange diameter B, stem length C and head thickness D, in mm. Check the seating surface and available depth as well as the hole diameter.

Need a different fit? Share the opening dimensions, mating profile and intended use for a custom size.
Discuss Your RequirementsProduct specifications
- Product form
- Removable closure fitted inside an opening
- Material
- Silicone. Specify the compound grade for the selected service.
- Application focus
- Laboratory flasks. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to laboratory flasks.
- Nominal size reference
- 15mm. Identify what each nominal value measures and confirm all mating dimensions and tolerances.
- Contact conditions
- Air, lubricating oil and acids: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Exposure to evaluate
- Sunlight or UV, moisture, dust or debris and oil splash. Validate the selected material under the combined conditions.
- Seating check
- Check the sealing contact around the opening and the force needed for insertion and removal.
Need a quote or a custom part?
Send your requirements, drawings or samples to discuss standard and custom silicone rubber parts.
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