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Maintenance Solutions for Corrosion Under Insulation

What is Corrosion Under Insulation (CUI)?

Corrosion Under Insulation (CUI) is one of the most significant maintenance challenges for asset owners.

When moisture becomes trapped beneath insulation, corrosion can develop quickly and often goes undetected. If left untreated, it can:

Compromise asset safety and integrity
Cause loss of production due to unexpected shutdown
Lead to costly repairs and disruption to otherwise planned maintenance

AkzoNobel's CUI & Cyclic Temperature maintenance solutions for downstream oil & gas

High Temperature Maintenance Range

Damage caused by Corrosion Under Insulation (CUI) and temperature cycling within the CUI zone is a major threat to asset integrity in oil and gas facilities.

Our high-temperature maintenance coatings are specifically formulated to deliver long-term resistance and protection against these conditions, helping operators maintain reliable performance and reduce unplanned downtime.

Insulated pipelines at an industrial facility

Key Benefits:

Provide confidence in the safety of your asset
Reduce downtime through efficient application
Pre-empt one of the leading causes of asset corrosion
Efficient application - streamlined application minimising downtime

The High Temperature Maintenance Range includes three specialist coatings, each designed to enhance installation productivity and deliver outstanding in-service performance, helping reduce the overall demands of high temperature maintenance.

Specialist CUI & cyclic temperature coatings

Intertherm® 751CSA

Temperature range: -196°C (-321°F) to 650°C (1202°F)

Renowned Cold Spray Aluminium (CSA) technology with excellent CUI and thermal cyclic resistance based on Titanium Modified Inorganic Copolymer
Enhanced resistance to thermal shock during rapid temperature cycling
Incorporates aluminium pigments for added anticorrosive protection
Single-coat application at 200µm (8 mils) using standard equipment
Suitable for application to steel substrates operating at up to 150°C (302°F)

Interbond® 2340UPC

Temperature range: -196°F (-321°F) to 230°C (446°F)

Reduces the risk of early CUI failure due to aluminium anticorrosive pigments in a phenolic epoxy resin system
Maximizes productivity with easier application
Low-temperature cure down to -5°C (23°F) using alkylated amine epoxy technology
Excellent tolerance to over-application
Short minimum overcoating intervals
Suitable for application to steel substrates operating up to 120°C (250°F)

Intertherm® 2205

Temperature range: Up to 230°C (446°F)

No need for shutdowns - can be applied directly to high-temperature online equipment
Hot application possible up to 205°C (401°F)
Excellent adhesion to hand- or power-tool–cleaned steel (St2/SP2)
Ready to insulate within 10 minutes after application at >100°C (212°F)
Excellent CUI protection due to added anticorrosive aluminium pigments in phenolic epoxy solution

View all CUI coatings

Intertherm 2205 capabilities video

Why choose a versatile CUI maintenance solution?

Maintenance is a year-round challenge, with coatings exposed to varying application conditions.

Traditional epoxy phenolic coatings for CUI service often struggle because they:

Do not cure below 10°C (50°F), causing delays in winter months
Have low tolerance to over-application, common in maintenance work on pitted steel
Can crack under stress during high temperature service

Our high temperature maintenance coatings are formulated to overcome these issues, delivering greater resilience in CUI and cyclic temperature service environments.