Heat resistant paint for high temperature protection
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. This is especially important in the UAE, where high temperature pipelines like the Offshore Associated Gas offshore pipeline system carry substances at 100° C and above. A heat resistant paint (also thermal management coating or heat proof coating) works to protect the substrate from variations and extremes of temperature without losing functionality. As well as protecting from heat, these coatings:
- Protect from corrosion under insulation (CUI): Provides an extra layer of protection between the hot surface and insulation
- Reduce thermal fatigue: improve performance of machinery and extend part life
- Allow for higher operating temperatures while limiting thermal exposure
- Effective temperature range up to 1000°C: Different formulations provide resistance to temperatures from -196°C to 1000°C
- Abrasion resistant: Suitable for rough environments
In this article we look at the different categories of heat resistant paint, how to choose the right one for your project, and where to find products and contractors in the UAE.
The four types of temperature resistant paint
It is important to note that while temperature resistant paint does provide some protection from flames, they are not fire resistant coatings. Essentially, heat resistant paints can be divided into four types:
- Epoxy-based, silicone-based, multipolymeric paints
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.
- Powder coating
As well as being corrosion resistant, high temperature powder coating has been developed for heat resistance to temperatures ranging from 200°C to 550°C. 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.
- Sprayed metal and metal additive coatings
These coatings are particularly used for corrosion protection combined with heat resistance. Thermal sprayed aluminium is particularly used 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 ceramic 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. With high temperature ceramic coating insulation the metal under it can be protected.
Choose the right high temperature 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 substrate temperature?
One of the most common reasons for failure is expecting these coatings to perform outside of the temperature range they were manufactured to tolerate. Each coating type has a specific temperature range, and outside it the functionality and efficacy fails. Make sure not to understate the maximum temperature.
For example, International Intertherm 50, a high temperature silicone coating, is recommended for temperatures up to 540°C
What is the substrate temperature during application?
There are high temperature coatings formulated for hot (up to 300oC) and ambient temperature application such as high temperature epoxy paint. A hot application may be required to avoid needing to shut down operations, spot coating problem areas, and generally not disrupting a facility.
For example, Jotun Epoxy HR, a heat resistant rust proof paint, can be applied on substrates up to 150oC
Is there substrate insulation?
If you are choosing a coating to combat CUI, that coating needs to be specially formulated for the purpose. It needs corrosion resistance, but it also needs to be able to be applied to hot substrates and deal with boiling water exposure.
For example, PPG HI-TEMP 1027 is designed to prevent CUI and can be applied to hot substrates, there is also heat resistant ceramic paint
High temp paint for steel combats corrosion under insulation
Insulating steel structures is very common in industrial environments; it can minimise heat gain or heat loss, reduces costs, improves efficiency, and improves staff safety. The problem starts when water penetrates the insulation, collecting in the space between the insulation and the steel. When this happens it is the perfect environment for corrosion. The trapped moisture has the potential to cause rapid rusting and corrosion on the surface of the steel.
CUI is particularly insidious as it can go undetected under insulation until the problem is severe. If it remains undetected, it can lead to shutdown of an entire facility, or even a safety incident. This is why a high temperature coating for steel is so important – it can coat the steel surface and protect it from the dangers of corrosion under insulation.
High temperature paint manufacturers and specialists in the UAE
Heat resistant coatings are used across a wide range of industries, as well as by homeowners and barbecue enthusiasts. As such, if you are looking for a heat proof coating, Africa and the Middle East have you covered. There are a wide range of products and services are available across the country, no matter your project. Heat resistant coatings should be applied by a trained professional and we are here if you need a thermal insulation coating quotation. If you would like more information about heat resistant paints or would like to connect with one of our partners to coat your project, contact us! Our specialists 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. Below is a short list of coatings provided by high temperature paint manufacturers operating in the UAE.
|Heat resistant paint product||Price||Packaging||Theoretical coverage||Substrates|
|Rustins Heat Resistant Paint||dh81.00||500ml||12-14 Sq. m. per litre||metal and wood|
|Blackfriar Heat Resistant Paint||dh113.00||500ml||20 sq.m per litre||metal|
|Rutland 1200 Degree F Hi-Temp Brush On Paint||dh143.00||473ml||50 sq. ft||steel, cast iron, aluminum, brick, and most other metals|
|Fascinating Finishes Ltd Heat Resistant Wall Paint||dh129.00||250ml||20 to 25 sq. ft||Wood Burner Stove Alcove. Brick, Concrete, Plaster, Cement Board, Rendering, Metal, Timber etc|
|KBS Coatings Xtreme Temperature Coating||dh223.00||473ml||27 sq. m||metal surfaces|