For the most variety of paints, about 300 degrees is the limit – beyond which they may fail to provide the desirable results.
But this is not the case with high temperature heat resistant paints.
As the name implies, heat-resistant paint is a type of paint that is designed to withstand temperatures that are far higher than room temperatures.
The paint is heat resistant because it combines inorganic pigment powder and a binder solution that is made up of polysilicon alkoxide.
The result is that the paint formulation can resist considerable amounts of heat. In fact, there are some paints that are designed to resist upwards of 600F degrees.
Some of them can also resist the temperatures as high as 750F degrees.
In general heat resistant type of paint is designed to resist the following…
- Smoke & Rust
The paint itself comes in different colors, mostly black, silver, grey, gold, white, orange, and red oxide.
Rust-oleum, Krylon, Vitcas, Behr, and Dulux are the most popular brands that manufactures these types of paints.
11 Most Common Applications of Heat Resistant Paints
Now when you know about what the heat resistant paints are exactly, you may be keen to know what are the most common places to apply heat resistant coatings?
Let’s check them out…
The combination of heat and moisture makes boilers an obvious subject for heat resistant paint.
By covering the metal parts in the boilers and water tanks, the heat and water-resistant paint also reduce the chances of corrosion from forming.
Because most of the heat from fireplaces moves through the chimney, they are subject to more intense heat as compared to the rooms in which the fireplaces sit.
In fact, heat resistant paint is used to lower the chances of fires that can be generated from the buildup of soot and debris inside the chimney that is located at your roof top or terrace.
3- Exhaust & Transmission Systems:
Mostly found in vehicles (like car or bike engines), the exhaust pipes and transmission systems generate a considerable amount of heat.
While standard paint will not last very long, heat resistant versions will hold up to the heat, grime, and debris that exhaust and transmissions systems are subject to receiving.
These are industrial fans designed to move heat through large spaces. Such fans are subject to high amounts of heat despite the dispersion of the air that the fans in motion generate.
Coating the blades with heat resistant paint protects the plastic or metal surfaces from moisture and the formation of grease along with the higher temperatures.
Although much of the heat from a fireplace goes straight up, it also flows out into the room.
Heat resistant paint is used on the stress points where the heat touches the interior walls, sides, or mantle of the fireplace.
6- Fire Pits & Grills:
The open heat takes its toll on grills and fire pits. This is why heat resistant paint works so well in protecting the surfaces.
Plus, it is durable enough to last for many years even when exposed to the elements.
These are essentially industrial ovens used to cure a variety of products.
The high temp enamel spray paint not only resists the heat but also protects the surface from other corrosive elements. And it makes the surfaces easier to clean.
Both commercial and residential ovens used for cooking are prime applications for heat resistant paint.
Cooking ranges that have high settings such as broil and grilling will need this type of coating to protect the surface areas.
9- Steam Pipes:
Still used in many homes and buildings for heating purposes, steam pipes also generate moisture due to condensation.
This is where paint that resists heat and humidity can be quite beneficial while still transmitting the heat to the rooms.
These are wood or metal stoves that use a variety of fuels to heat and cook food products.
In many ways, stoves, heaters, burners and gas fires are quite similar to furnaces in their construction.
The paint will resist the heat, smoke, and flames for a long time under normal use conditions.
11- Light Bulbs and Fixtures:
During the festive seasons like Halloween and Christmas, many people prefer to paint glass lamp shade, light fixtures, light bulbs, etc. to make them decorative.
This kind of paint when applied to these surfaces bonds well and ensure that it remains on them for long without any kind of damage made.
How to Apply High-Temperature Heat Resistant Paint Correctly?
Applying heat resistant paint is easy, especially if you are using an aerosol spray can.
Here are few steps you need to follow:
- Turn off the heat or any other source of ignition and allow the surface to cool down
- Now clean the surface using a cotton cloth and make sure it’s free from dust, dirt, grease, and rust
- Mask off the areas you do not want to coat. Also, use a drop cloth or a newspaper to avoid overspray damage
- Now take the aerosol paint can and shake it vigorously for about 2 minutes to mix the paint well
- Holding the aerosol can at about 12”-15” from the item spray the object directly
- Make sure you spray over the item evenly and apply at least two thin coats, it’s better than applying one thick coat
- Allow the coat to dry for about 15-20 minutes between the two coats
- After applying the final spray coat wait for 6-8 hours before using your item
Do you need to apply primer before applying high temperature paint?
Most high temp. paints, when used for interior applications, do not need to apply primer and are self-priming.
However, if you are using the paint for exteriors, it’s good to apply a high temp primer prior to painting.
This will help in adding an extra layer of protection for resisting high humid climates, cold air, rain, snow, and other environmental conditions.
What is the Difference between Heat Resistant and Fire-Retardant Coating?
Flame and Fire are many times used interchangeably in place of one another.
Also, when we talk about Resistant vs. Retardant paints and varnishes many people get confused with these terms that may sound to be same but are different.
Resistant is a type of coating material that is inherently resistant to catching fire. It actually provides a kind of insulation to the surface.
This also means that this type of coating is self-extinguishing in nature and it does not drip/melt when exposed to extreme heat directly.
Retardant on the other hand is a type of coating that has been “chemically treated” and made to be self-extinguishing.
Fire retardant and fire-resistant paint coatings are both designed to be used on different substrates and will respond differently when exposed to direct fire.
Fire Retardant coatings, for example, can be applied (using a brush, roller or spray) to combustible materials like wood or plastic and can help in reducing the rate at which the flame spreads.
Fire Resistant coatings are more useful for coating furnaces that reaches very high temperatures very quickly.
Since Fire Resistant coatings are thicker than fire retardant coatings these are often sprayed or troweled on.
The Bottom Line
Heat resistant paints and coatings are great for homeowners, businesses as well as industries – where they need to deal with high temperatures.
Since there are number of different products available for varied purposes and temperature ranges, its important that you choose the right product and apply it correctly.
This will most probably help to save you good amount of time and money.
Jack Luis is a semi-retired painter who loved painting his clients’ ideas on their walls. He had worked as a painter for more than a decade to serve the customers in areas such as Charleston, Mount Pleasant, Beaufort, Georgetown, SC (South Carolina). Today in his free time, he likes to read and write about the newer techniques that are being implemented in his profession. You may read more about him here or get in touch with him here.