miniature o-rings
Miniature O-Rings

Super small o-rings as well as large o-rings with tiny cross sectional diameters.
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chemical resistant rubber seals
Chemical Resistant Seals

High performance materials from our own material databases.
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Low Contamination and Out-gassing

Class 100 clean room facility for ultra high purity, cleanliness, and minimal contamination.
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Custom Diaphragms

Ultra thin, high accuracy diaphragms for medical, automotive, aerospace, and more.
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Rubber Vibration Insulators

Small size, high precision insulators manufactured with stable characteristics.
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Custom Molded Rubber

Custom moldings are available in a range of sizes 0.2mm (0.008 in) to 500mm (19.7 in).
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Industries Served


KEF Medical Group is highly specialized, tailored to your medical needs. We have FDA compliant medical grade materials and can develop new materials for your needs in a timely manner.
KEF produces seals for Pacemakers, Endoscopes, Vail Container Cork, Infusion Rubber Stopper, Prefilled Syringe Gaskets, Needle Tip Protection Caps and more.


Requires manufacturing according to strict quality standards.
KEF has materials such as AMS-P-5315. KEF produces diaphragms for jet engine fuel pumps, thickness 0.025″±0.004 dia. 2.840″ with nylon cloth inside.
Watch o-ring for astronaut’s space suits, which withstands 1000psi and -20°C +70°C etc.


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