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Sigmatherm Range
Designed for durability and performance, PPG coatings protect assets in sectors such as petrochemical, offshore, and energy. A versatile range of heat resistant paints, Sigmatherm delivers exceptional thermal stability, corrosion resistance, and ease of application. Ideal for both new constructions and maintenance projects, the range supports long-term structural integrity under thermal stress. Whether it’s pipelines, exhaust systems or process vessels, Sigmatherm ensures high-performance protection without compromising application efficiency or environmental standards.
PPG SigmaTherm 540
PPG SigmaTherm 540 is a one-component, heat-resistant, moisture-curing silicone aluminum coating for protecting steel surfaces in internal and external applications. Complies with NACE SP0198 for austenitic stainless steels and carbon steels under thermal insulation. Dry heat resistance up to 600°C (1112°F) No heat cure necessary between...
PPG SigmaTherm 350
PPG SigmaTherm 350 is a heat-resistant silicone/acrylic finish, featuring excellent resistance against weathering and a minimum drying time of 3 days at 20°C (68°F) should be allowed before exposure to heat. Heat-resistant up to 350°C (660°F) To be used for the internal and external protection of steel surfaces Widely compatible with...
PPG SigmaTherm 230
PPG SigmaTherm 230 is a two-component, high-build, heat-resistant epoxy phenol novolac coating that provides a corrosion resistant barrier on carbon steel and stainless steel under thermal insulation. Suitable as heat resistant system under insulation up to 230°C (450°F) as well as for use in cryogenic conditions. Meets CS-1, 3 and 4 for...
PPG SigmaTherm 175
PPG SigmaTherm 175 is a heat-resistant modified alkyd aluminum finish that offers heat resistance up to 175°C (350°F). One component High-brilliancy Spray application improves the appearance Gloss finish Touch dry in 1 hour (at 20°C (68°F)) Ready to overcoat after 16 hours (at 20°C (68°F))
PPG SigmaTherm 500
Aluminium eggshell finish. For the internal and external protection of steel surfaces. Heat-resistant up to 500°C; a minimum of 200°C is necessary to fuse the aluminum coating. Heat resistant modified alkyd aluminium coating. Important! A minimum drying time of 3 days at 20°C (68°F) should be allowed before exposure to heat....
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PPG Sigmatherm Heat Resistant Coatings
PPG’s Sigmatherm range offers industrial-grade heat resistant coatings to be used in place of traditional metal paints, ideal for metal structures, pipelines, and process vessels in demanding environments. Engineered for thermal stability and long-term protection, these coatings suit both new and maintenance applications. The range includes products designed to withstand extreme temperatures, reduce thermal degradation, and maintain structural integrity under thermal cycling.
Sigmatherm products are available in single- and two-component systems, tailored to application requirements and surface types. They are ideal for sectors including petrochemical, industrial, energy, and offshore usage alongside marine coatings. With low VOC options and user-friendly application methods, they support compliance and efficiency in complex coating jobs.
Sigmatherm FAQs
What surfaces are suitable for PPG Sigmatherm coatings?
Sigmatherm products are formulated primarily for ferrous metals such as carbon steel and stainless steel. These coatings can be applied to pipework, structural steel, and process vessels where high temperature resistance is essential. Surface preparation is critical, and abrasive blasting to a specified standard is typically recommended to ensure adhesion and longevity.
What temperature ranges can the Sigmatherm range withstand?
The Sigmatherm range includes products that can tolerate continuous exposure to temperatures from 200°C up to 650°C, depending on the formulation. Some products are designed for dry heat only, while others can endure fluctuating temperatures and limited humidity without compromising performance.
Are there any safety considerations during application?
Proper PPE should be used during application due to solvent content and fine particulates. Ensure adequate ventilation, especially for spray applications. Follow PPG’s technical datasheets for detailed health and safety guidelines, as product-specific risks vary across the range.
How long is the curing time before heat exposure?
Curing times vary by product and ambient conditions but typically range from 24 to 72 hours at room temperature. Some coatings may require a staged heat cure to reach full performance. It’s crucial to refer to each product’s technical documentation for curing instructions prior to heat exposure.