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Corrosion Under Insulation (CUI) Coating

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Protect your critical piping and equipment

Page last modified
March 16 2023

Hempel has developed a unique coating system to help protect from the hidden dangers of CUI.

In just two coats long term protection in hot wet environments such as those found below thermal insulation can be provided.

The system is based upon polysiloxane technology but with a unique fibre reinforced filler system which helps provide additional protection from cracking due to high temperatures and thermal cycling.


Heat resistance up to 650°C covering multiple specification categories
Single pack eliminates mixing errors and reduces wastage
Can be applied to surfaces up to 200°C eliminating the need to shut down
Suitable for insulated and uninsulated equipment simplifying coating selection
Low halogen content – suitable for stainless steel
Limited range of colours


Areas of Application For long term protection of hot pipework, equipment and other hot surfaces.
Application Applied directly onto the steel substrate or with a suitable inorganic primer.
Certifications/ Licenses Conforms to NACE SP-0198 2017 : systems SS-5, CS-6 and CS-8
Preparation Can be applied to grit blasted and manually prepared surfaces.
Service Temperatures -196°C to 650°C
NORSOK M-501 Approval Approved in conjunction with inorganic zinc silicate primer.

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Technology Readiness Level


Development Technology demonstration Mature / Proven
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About Hempel

Hempel is a world-leading coatings supplier to the decorative, protective, marine, container and yacht markets.

From windmills and bridges to hospitals, ships and homes, our coatings protect man-made structures from the corrosive forces of nature. They help prolong a structure's service life, reduce maintenance costs and, we like to think, make it more attractive.

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