rubber post caps
Even though one might think that all rubber post caps do the same thing, but they could not be more wrong. Yes, the purpose of a post cap is to seal a post and prevent its insides from various external influences such as various impurities, humidity, and others, but you should not expect the same results from different models of rubber post caps. The first thing you should take care of is to pick the right size in order to secure that the cap matches the opening you intend on sealing. Even though this might sound as if it was a piece of cake, you would be amazed to find out about the number of repeat orders we handle daily due to the wrong measurement. Thus, if you have problems with determining the size of rubber post caps that would suit your wants and needs, feel free to reach out to our support team, since they will gladly answer your questions, no matter how silly they might appear.
Once you are done with the basics, you should focus on choosing the characteristics your rubber post caps should potentiate. Namely, not all rubber post caps are crafted equal, since some perform optimally even when they are exposed to extreme temperatures and enhanced friction surroundings, while others have no special features and are designed for short-term use. Yet again, we should highlight that our experienced technical support team stands at your disposal, and will gladly explain the production process to you while trying to come up with a joint solution that would satisfy both parties.
Finally, after you are done with choosing the characteristics, the time for picking the color for rubber post caps comes. Even though this feature is purely aesthetic, you should know that you have a choice, rather than going for the standard black.
Rubber Cap Size Catalog
Compare the internal and external dimensions of rubber caps against the part being covered.
Rubber Caps-RSE
Compare A (inner diameter), B (outer diameter), C (inner depth) and D (total height), in mm.

Need a different size? Share your drawing, mating dimensions and intended use to discuss a suitable part.
Discuss Your RequirementsProduct specifications
- Product form
- Protective cover fitted over a component end
- Application focus
- Poles or posts. Size the part against the selected assembly.
- Dimensions to confirm
- Mating outside dimensions, cover depth, cavity and wall thickness. Match these to poles or posts.
- Exposure to evaluate
- Heat and cold cycling and moisture. Validate the selected material under the combined conditions.
- Cover retention
- Check the installed overlap and pull-off force on the actual end profile.
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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