high heat coating applied on a machine that may get hot

High heat coating for protection from extreme temperatures

When a substrate is subject to heat and rapid temperature fluctuations, it can lead to surface breakage and corrosion. Electrical and engine components, chimneys and ovens, pipework and chemical plants, all these are exposed to possibly damaging temperatures and conditions. A high heat coating works to protect the substrate from variations and extremes of temperature without losing functionality.

In this article we take a look at the different categories of high temperature coatings and explain how to choose the right one for your project. Here you will also find some product suggestions and high heat coating contractors in Korea.

Benefits beyond heat resistance

high heat coating preventing from heating

High heat coating is used on steel to prevent the surface from losing crucial properties when hot.

The primary task of a high temperature coating is to protect a surface (usually steel or other metal) from extreme temperatures and temperature fluctuation. However, the heat resistant coatings also have other benefits; they:

  • Allow for higher operating temperatures while limiting thermal exposure; increasing efficiency
  • Protect from corrosion under insulation (CUI): provide an extra layer of protection between the hot surface and insulation
  • Resist temperatures up to 1000°C: Different types of high heat coating provide resistance to temperatures from -196°C to 1000°C
  • Abrasion resistant: Suitable for rough environments like industrial and offshore
  • Reduce thermal fatigue: High heat coating improves performance of machinery and extend component life

The types of high heat coating – which one do you need?

Essentially, high heat coatings can be divided into four types: liquid resin and polymeric coatings, powder coatings, metal and metal additive spray coating as well as ceramic coatings.

Metal coatings and additives
These coatings are particularly used for corrosion protection combined with heat resistance. Thermal sprayed aluminium is particularly used as high temperature coatings for steel for CUI prevention in onshore and offshore platforms and processing plants. Metal pigments are often used as stabilisers for temperatures above 400°C.

Heat resistant powders
As well as being corrosion resistant, high temperature powder coatings have been developed for heat resistance to temperatures ranging from 200oC  to 550oC. The powders are usually epoxy and silicone-based (like the liquid paints), and silicone-based powders perform better at higher heats. These have the benefit of being VOC free and having a wide range of gloss and colour finishes. They are becoming more and more popular as high heat coating for metal.

Ceramic high heat coating
The heat resistance properties of ceramic coating are well known, and some of the highest heat coatings available are ceramics. Heat resistant ceramic paint also provides corrosion protection and chemical resistance and a hard finish.

Epoxy and silicone based liquid paint
Single or two component, water- or solvent-based, these paints are formulated to provide resistance to high heat when applied at new construction, on-site and as a maintenance coating. Usually the more silicone, the higher the temperature resistance. For medium to high temperature protection. Liquid paints have the benefit of being able to be applied to hot substrates without affecting the coating.

3 Questions to take you closer the right heat resistant coating

As with any coating application, understanding the needs of your substrate and the application process is crucial for making the right coating choice. As well as knowing the substrate type, you need to know its environment, its use, the coating time parameters, and the likely ways it will fail. Here are some questions you need to ask before you can choose a high temperature coating:

  • What is the maximum temperature of the substrate that you wish to protect? – Make sure you choose a coating that has a guaranty to perform well in the temperatures involved in your processes.
  • Is the substrate insulated? – High heat coating effectively prevents corrosion under insulation (CUI) but only when the coating is designed for that purpose.
  • What will the substrate temperature be during application? – Not all high heat coatings are able to be applied on hot surfaces. If your application requires hot application, make sure to pick a product that can takes it!

 High heat coating products in Korea from the top manufacturers

Heat resistant coatings are used across a wide range of industries, as well as by homeowners and barbecue enthusiasts. As such, a wide range of products and services are available across the country, no matter your project. Below is a table outlining just a few of the products and their costs, as an indication. High heat coatings should be applied by a trained professional. If you would like more information about heat resistant coatings, or would like to connect with one of our partners to coat your project, contact us! Our experts are here to help, just use the “Request a quote” button below the article and take advantage of our 100% free quote service.

For information on where to find high temperature powder coating, please visit our powder coating services page.

High Heat Coating ProductProduct DescriptionApplications
PPG HI-TEMP 1027One component, silicone-based ceramic coating for carbon steel and stainless steelCUI prevention in chemical/petrochemical, power, and offshore market segments up to 650°C
International Intertherm 50Single components, silicone-based high temperature coatings for steelCorrosion protection in fire stacks, chimneys, exhausts, vents and pipework up to 540°C
Jotun Solvalitt Midtherm Single component silicone acrylic high heat coating for metal; steel and aluminiumCorrosion protection for insulated and non insulated surfaces up to 260°C
Rust-Oleum 4200 Heat Resistant TopcoatSilicone-based topcoat with an aluminium finish for bare steel or primed surfaces Heat resistance up to 425oC

High temperature coating manufacturers in Korea

High heat coating is a product often included in the portfolios of international protective coatings manufacturers. For example the following internationally known companies provide high heat coatings and have business units in Korea.

Anti corrosion coating manufacturerAddress (South Korea)
AkzoNobel Pacific Korea402Ho, 4th Floor, 987-5, Singa-dong, Gwangsan-gu N/A , 506-307 Gwangju
PPG Korea Ltd.128-7 Yongdang-Dong , Busan, Busan 608-829 , Korea (Republic of)”
Hempel(Korea)Co.LTD. 5th floor, SK Global bldg,, Jobang-ro 16 beon-gil 5,, Dong-gu, Busan
BASF39 Sejong-daero, Namdaemunno 4(sa)-ga, Jung-gu, Seoul, South Korea
Sika Korea Ltd. 16, Nonhyeon-ro 135-gil, Gangnam-gu, Seoul 06041
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