Thermaguard CUI 650

Thermaguard™ CUI 650 – Ambient-Cure Polysiloxane Coating for Corrosion Under Insulation

Thermaguard™ CUI 650 is a cutting-edge, single-component, ambient-curing polysiloxane coating developed for Corrosion Under Insulation (CUI) protection across an extreme temperature range from -196°C to +650°C.

Engineered as a third-generation polysiloxane, it eliminates the need for pre-service heat curing, offering unrivalled protection in both cryogenic and high-temperature environments—ideal for carbon and stainless steel surfaces exposed to insulation and thermal cycling.

Key Features & Benefits

• ✅ Extreme Temperature Resistance – From -196°C to +650°C

• ✅ Ambient-Cure Technology – No heat curing required

• ✅ Application to Hot Substrates – Up to 300°C in service

• ✅ Meets NACE SP0198-2010 – Certified CUI mitigation system

• ✅ Single Component – Simplified handling and application

• ✅ High Build Coating – Durable protection in harsh environments

• ✅ Applies to St 2/3 Surfaces – Suitable for marginally prepared steels

• ✅ Use as Primer with TIC 400 – For added insulation and thermal protection

Proven Performance

Thermaguard™ CUI 650 has undergone rigorous laboratory and field testing, including:

• Rapid thermal cycling

• Boiling saline water immersion

• Weathering & UV resistance

• C5 corrosion environment exposure

• Chemical & mechanical resistance (ISO & ASTM tested)

Ideal Applications

• CUI protection for carbon & stainless steel

• Cryogenic systems, LNG, and cold processing plants

• High-temperature process equipment, pipework, and vessels

• In-situ maintenance of existing infrastructure

• Hot application up to 300°C without system shutdown

Technical Specifications

• Type: Third-generation polysiloxane

• Cure Mechanism: Ambient (no heat required)

• Operating Temp Range: -196°C to +650°C

• Hot Surface Application: Up to 300°C

• Surface Prep: St 2/3 marginal prep suitable

• System Compatibility: Primer for Thermaguard™ TIC 400

Need a complete insulation system? Pair with Thermaguard™ TIC 400 for superior thermal insulation and anti-corrosion performance. Contact our team on 01268 472358 for technical support and full system specifications.