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ArmaFlex insulation materials minimise the risk of Corrosion Under Insulation (CUI)
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Corrosion Under Insulation (CUI): A Billion dollar problem


Corrosion Under Insulation (CUI) is a major issue for oil, gas and chemical process industries. It is estimated that up to 10% of annual maintenance costs are caused by CUI; severe cases of CUI may put personnel, environment and reputation at risk. Furthermore it’s estimated it accounts for 40% to 60% of pipe maintenance costs – estimated to be around $1 trillion annually.

We’re here to help: our lightweight, resilient and compact insulation systems provide highly effective barriers to water and water vapour.


Water vapour ingress: InnCoa: Independent test of ArmaFlex

The choice of insulation system is a critical factor in the mitigation of CUI. A dedicated engineered simulation was conducted by the widely renowned corrosion specialist institute InnCoa based in Germany. To assess the resistance capabilities of commonly used insulation systems related to the ingress of water vapour and the onset and spread of corrosion in a high humidity environment.

The insulation systems included: Flexible Elastomeric Foams (FEF), Glass Fibre, Polyurethane and Stone Wool.

The results confirmed in detail how closed cell FEF insulation systems have demonstrated best in class performance on resistance against water vapour ingress and the spread of CUI.






Liquid Water Ingress: TNO-Endures: Independent test of ArmaFlex

Following a rigorous six-month test – set up to replicate the harshest of off-shore conditions – the renowned TNO-Endures has confirmed that ArmaFlex, with its closed-cell structure and integrated water barrier, provides an effective barrier both to water and water vapour.

The results confirm the real-world performance of our insulation systems with many entering their second decade of service in installations across the world. The test method developed by TNO is the first standardised procedure to assess insulation materials regarding their performance in mitigating CUI.








Copyright: Armacell Enterprise GmbH & Co. KG Imprint Date of Release: 20/4/2018

On these pages we have provided general technical data for the application of our products. For specific industry standards and further guidance within a particular country, please contact our customer service.

All statements and technical information are based on results obtained under typical conditions. It is the responsibility of the recipient to verify with us that the information is appropriate for the specific use intended.