Korex is a high density material commonly used in foot orthotic manufacture in the USA for accommodations, forefoot extensions, arch reinforcements and wedges as it can resist compression forces. Korex is not used outside of North American for this, but other cork based materials are. It is a blend of cork granules and rubber. It is not thermoformable. It generally is available in 1/8″ and 1/4″ thicknesses in sheets that are 18×36″ in size.

Korex is often mentioned as being trademarked (eg KorexTM), but no relevant trademark can be found. The only trademarks for Korex that can be found are those related to cleaning materials. (Does anyone know about this and can help clear it up?).

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