When it comes to painting fireplaces, barbecues, cooking areas, and the likes, one feature that the paint has to have is heat resistance. So is spray paint heat resistant?
Spray paint is heat resistant. Most spray paints can withstand high temperatures up to 200 degrees. There are also specific spray paints like rust-oleum that can withstand over 300 degrees.
The main reason spray paint can thrive in high temperatures is because of silicone compounds in the paint particles. However, you should know that not all spray paints are heat resistant and some are more heat resistant than others.
There is more to know about spray paints and their heat-resistant qualities. For instance, what temperature can spray paint withstand? Let’s take a closer look at that.
What Temperature Can Spray Paint Withstand?
Generally, heat-resistant spray paints can withstand temperatures between 200 degrees and 400 degrees. On average, spray paints advertised as heat resistant can withstand high temperatures up to 300 degrees.
There are spray paints that thrive in higher temperatures. But, you should also know that not all spray paints are heat resistant. The main reason spray paints can withstand higher temperatures than most paints is because of the silicone-based compounds in the paint formula.
Silicone is a compound that is heat resistant due to the low level of thermal conductivity. This means that silicone transfers heat at a very slow rate making it possible for the compound to retain its form even when exposed to high temperatures for extended periods.
The presence of silicone materials in spray paint makes it heat resistant but there are specific spray paints built for heat. These spray paints are 100% silicone-based and can withstand up to 800 degrees Fahrenheit of heat.
You should also know that not every spray paint is heat resistant. While there are spray paints that can withstand very high temperatures, some others will melt when exposed to temperatures higher than 250 degrees Fahrenheit.
For instance, spray paints designed for indoor use or decorative purposes don’t thrive as much in high temperatures. However, you can also increase the heat resistance of spray paint by sealing the finish with varnish.
To know if a spray paint product is heat resistant or not, check the spray container for information. Another thing to know is if spray paints melt in heat and at what temperature will this happen? Let’s find out.
Related Read: Is Spray Paint Waterproof?
Does Spray Paint Melt In Heat?
Spray paints do melt if exposed to higher temperatures than the maximum capacity of the paint. When the temperature gets too hot for spray paint coating to handle, the paint starts to liquefy or bubble. Then after a few minutes, the paint coating starts to melt off the surface.
The reason spray paint melts and doesn’t burn or catch fire is because of the curing process of the spray paint. The paint dries hard by bonding the paint particles together tightly.
When exposed to high temperatures, the bond between the paint particles begins to liquefy causing the paint particles to slide off and lose grip. This is how the paint gradually melts off the surface.
It’s also common to notice gasses and fumes being released in the air as the spray paint is melting. This is especially common with spray paints that contain a high volume of volatile organic compounds (or VOCs).
While the heat causes the paint particles to lose bind and melt off, it causes the VOCs and chemicals to turn gaseous. The gasses being released can be toxic so it’s best not to inhale.
When the paint melts off the surface, it touches the ground where it is exposed to cool air. The cool air reignites the curing process of the paint again causing the melted spray paint to solidify.
Related Read: Does Spray Paint Freeze?
What Color Does High Heat Spray Paint Come In?
High heat spray paints used to come in either black, silver, or aluminum color. But the diversity in high heat spray paint brands and types means high heat spray paint now comes in different colors including black, white, almond, and green.
The color of the high-heat spray paint doesn’t matter. But, white high heat spray paint has been rumored to turn yellowish when exposed to high temperatures constantly. So it might be best to go for a deeper shade of high heat spray paint.
High heat spray paints are also called high temperatures spray paints. These spray paints are designed for painting items that will see intense heat such as boilers, cookers, and grills.
The paint is 100% based on silicone resins and they give a decorative finish. Most high-temperature spray paints are lacquers or have lacquer in them. Since lacquer is a glossy finish, you can’t get a matte or flat finish with high-heat spray paints.
Is Rust-Oleum Spray Paint Heat Resistant?
Rust-oleum spray paint is heat resistant. Heat-resistant rust oleum paint or primer is designed to withstand high temperatures up to 425 degrees. This makes the paint ideal on exhaust pipes, boiler pipes, and valves.
The main reason rust oleum spray paint is very heat resistant is that the paint is designed for use on metal parts of engines and vehicles.
These metal parts are known to produce intense temperatures of up to 400 degrees. And as such, the paint designed to be used on these metal parts has to be able to withstand heat as well.
Here are a few questions commonly asked by DIYers like yourself about the heat-resistant qualities of spray paint.
What Is the Best Color of Heat-resistant Spray Paint to Use?
The best colors include black and silver also known as aluminum. Brown is also a good choice. This is because these colors are less likely to show burn marks or staining. White spray paint is known to turn yellowish after a while.
Are All Spray Paints Heat-resistant?
No, not all spray paints can withstand heat.
Can You Seal Heat-resistant Paints?
You don’t have to seal heat-resistant paints but if you choose to, you should only use a heat-resistant sealant such as bar-top varnish.
Overall, spray paint is heat resistant but not all spray paints are designed to withstand high temperatures.
Before you coat an area that will see high heat with spray paint, ensure the spray paint is designed to be heat resistant. Otherwise, the paint will melt off.