red silicone number 13 stopper
Whether our customers have to seal different tubes and flasks or if they have to ensure that no contaminants enter the space under a hole in a surface, they could choose to use our red silicone number 13 stopper. Not only will our stopper prevent different contaminants – air, grime, dirt, ozone, acids, oils, and light – from damaging the substances underneath the stopper, they will also resist extremely low and high temperatures which is why a lot of manufacturing and assembly plants choose to use it in both indoor and outdoor settings. Some of the most common industries that use our red silicone number 13 stopper include the automotive, marine, military, as well as construction, and furniture industries.
Why do these industries choose to use our red silicone number 13 stopper? Well, it is quite simple to understand, it is manufactured from high-quality rubber materials, which makes them extremely durable and long-lasting, however, they are quite soft and flexible at the same time. These characteristics enable our customers to easily install and use the stopper, thus, there will be no need for additional training or adhesives, which can, in fact, save a lot of money for our customers.
They are also resistant to the weather elements, hence, snow, ice, rain, and heat from the Sun will not cause the stopper to deteriorate quickly, which is not something that can be said for some other products available on the market. It is worth mentioning that our red silicone number 13 stopper, comes in other shapes, sizes, and designs, which means that you will definitely be capable of finding something that suits your needs and requirements. Additionally, we do offer customization services, as well as kits, so, if you cannot find something that you are looking for, it is highly possible that we can create them for you.
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.
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.
- Size designation
- Designation 13. Match it to the specific top diameter, bottom diameter and height on the supplier drawing.
- Color reference
- Red. Approve the shade on the selected compound and finished surface.
- Contact conditions
- Air, acids and lubricating oil: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Exposure to evaluate
- Ozone, outdoor weather, 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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