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Custom Silicone Caps & Covers

Silicone caps and covers that protect ports, connectors, threads and ends from dust, moisture and damage — molded to your exact fit, in food and industrial grades.

Protective Covers

Caps & Covers That Shield and Seal

A cap or cover protects what it slides over — sealing a port, guarding a thread, or shielding a connector from dust and moisture. We mold silicone caps and covers in push-on, threaded, flanged and custom profiles that fit snugly and stay secure.

  • Push-on & threaded caps — snug, secure fit
  • Connector & port covers — dust and moisture sealing
  • Flanged & end caps — for pipes and tubes
  • Food & medical grades — FDA / LFGB compliant
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Silicone sealing caps and flanged covers measured with a caliper at the CYES SILICONE factory
Material & Performance

Choosing the Right Cap or Cover Material

Match the compound to your protection and sealing needs.

RequirementRecommended gradeTypical hardness
Food & beverage contactFood-grade silicone (FDA / LFGB)50 – 60A
Medical / pharmaceuticalMedical-grade platinum-cured silicone40 – 50A
Electronics / connectorsSolid silicone rubber (RoHS / REACH)60 – 70A
Fuel & solvent exposureFluorosilicone (FVMQ)60 – 75A

Compression Set

Low-compression-set compounds keep the cover sealing and reusable over repeated cycles.

Temperature Range

Rated from -40 °C to +230 °C depending on the compound selected.

Precision Fit

Mold cavities machined to ±0.01 mm, with finished-part tolerance confirmed during DFM.

Common Questions

Silicone Cap & Cover FAQ

Yes. We mold silicone caps and covers that seal against dust and moisture for connectors, ports and threaded ends. IP rating depends on fit and design, which we optimize during DFM.
Yes. We mold caps with internal threads to match your fitting, as well as push-on and flanged styles for smooth or barbed ends.
MOQ is flexible and depends on size and cavity count. Small prototype batches are available for verification, with multi-cavity tooling for cost-effective volume production.
Yes. We offer food-contact and medical-grade platinum-cured silicone caps tested for FDA 21 CFR, LFGB, RoHS and REACH compliance as required.

Need Silicone Caps & Covers?

Send your drawing, sample or dimensions. We will review material, hardness and tolerance before quoting.

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