1/2 silicone stopper
If you need a product to prevent fluids from escaping a container with the diameter of 1/2″, then we have just the product for you. We make stoppers that can be used on any container or bottle and prevent fluids and oils from escaping. As such, our 1/2″ silicone stopper is a must-have household item. The versatility of stoppers in modern life cannot be underestimated. No one can predict when you’ll need one. But once you do, rest assured that we’re here to cover all of your needs.
Since our bottle stoppers are made from silicone, do know that you’re getting a product that is not only functional but highly durable. Silicone is one of the most durable materials out there. It is used across hundreds of industries and is very effective in stopping fluids from escaping a container. As such, our 1/2″ silicone stopper is the right product for your needs. If you need a stopper to prevent fluids from escaping, then this is the product for you. Regardless of whether it’s a bottle or a container with an opening of half an inch, this product is the right choice for the job.
In addition to all that, silicone is also a material with high thermal properties. This adds another dimension to the item – since you can put it in the sun or the freezer and it won’t be caused by the excess cold or heat.
We make silicone stoppers in all sizes, not just 1/2″ silicone stoppers. Since chances are you might require a different size of stopper, our website has all the information you need to make the right purchasing decision. If you have any questions regarding this or any other product, don’t hesitate to contact us. We are more than eager to assist you and more than happy to lend a helping hand.
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
- Bottle necks. Size the part against the selected assembly.
- Dimensions to confirm
- Opening diameter, closure profile, insertion depth and exposed grip. Match these to bottle necks.
- Contact conditions
- Lubricating oil: define concentration, temperature and contact time, then check compatibility with the chosen compound.
- Exposure to evaluate
- 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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