How to Use High Temp Paint? All You Need to Know are Here

Extreme temperatures always stimulate oxidation, which results in pitting, rusting, and even a loss of structural support. That’s why choosing the suitable coating by using high temp paint to prevent this is a MUST. The high temperature paint includes properties that can save exhausts, industrial machinery, engine manifolds, outdoor grills, and so on.

Because of this, lots of users tend to avail these paints to improve the appearance and presentation of exterior surfaces. But do you know how to use it correctly? Is there anything to consider? Is it suitable for all the surfaces?

Don’t worry since you are here, guys. Right now, we will disclose everything to help you understand better. Don’t hesitate anymore!

Come with us!

High Temp Paint

What do You Know About High Temperature Paint?

Definition

First of all, you need to know that high heat paint, heat resistant spray paint or high heat spray paint is the same. All offer beautiful and sturdy protection for commercial and industrial surfaces that are exposed to constant heat from 5000F to 15000F.

Or if you want these paints for extreme inland or offshore environments, they are useful to give anti-corrosive protection and high-performance humidity resistance. The standard colors are often black and silver (also aka aluminum). But you also find out other colors such as grey, white, orange or red oxide.

Additionally, please NOTE that although the heat resistant paint DOES offer protection from flame, it’s not fire-resistant coatings.

Common Types

There are four main types of heat resistant paints that you should know, including:

Silicone-or-epoxy-based, multi-polymeric paints: This kind of paint is formulated to offer resistance to a high temp when applied at new construction or a maintenance coating. Also, it’s able to be used to hot substrates without influencing the layer. Usually, the more silicone is, the higher the heat resistance is.

High temp powder coating: The high temp power is often silicone and epoxy-based (similar to the liquid paint above). But it performs better at higher heat, ranging from 4000 to 10000F. Is there anything else? It’s VOC free and comes with a massive range of gloss and color finishes.

Sprayed metal and metal additive coatings: They are mainly availed for corrosion protection combined with heat resistance. Thermally sprayed aluminum is used for CUI prevention in offshore and onshore platforms and plants. Meanwhile, metal pigments are utilized as stabilizers for temperatures up to 7500F.

High temp ceramic paint: This type is famous for its heat-resistant properties. It also offers chemical resistance, corrosion protection, and a hard finish. When using the high temp ceramic paint, insulation and the metal under it will be protected well.

Excellent Benefits

When a substrate is exposed to the extreme temp, it can result in the surface breakdown, corrosion, and coating failure. Pipework and chemical plants, electrical and engine parts, ovens, and chimneys, etc., all are subject to possibly harmful temps and conditions.

That’s why using high heat paint is necessary to protect the substrate from high temperatures without failing functionality. And to know the top benefits of this paint, please look down here, guys!

  • The effective temp can range up to 18000F.
  • It helps to lessen thermal fatigue, improving performance of engines and prolong the life of components.
  • It’s abrasion-resistant that is fit for severe environments.
  • It permits higher operating temperatures and limits thermal exposure at the same time.
  • It prevents corrosion under insulation. That means it offers an additional covering of protection between insulation and the hot surface.

How to Use High Temp Paint?

Typical uses for High Heat Paint

These paints are used across a huge range of industries as well as by barbecue enthusiasts and homeowners.
Below are some typical uses for this paint!

Auto engines and transmissions , steam pipes, diesel exhaust systems, motors, radiators, furnaces, wood stoves, broilers, barbeque grills, ovens, trash burners.

But the question is, How to use it to cover these things correctly? Are they similar? Indeed, most of the instructions are the same. However, it’s best to know each particular way for each different item or engine. Hence, we decide to show some so that you can follow and then perform by yourself.

High Heat Paint

Steps To Paint A Wood Stove

Before starting your paint job, you need to check with your appliance manufacturer and ensure that the paint is suitable. And here are three main steps, guys.

Prepare the surface:

Firstly, you should check and remove any rust, blistering or peeling on the surface of the wood stove. Sanding, sandblasting or grinding is a good way to help you at this time.

After that, don’t forget to examine oil, dirt, grease or other contaminants because these prevent the paint from sticking to the stove. Then use a solvent degreaser to remove them.

Next, prepare glasses, gloves and anything else that can protect you from getting paint.

Apply the paint:

The first thing is to shake the can about 1-2 minutes. This guarantees that the solvents and pigments of the paint are mixed well. To get the best results when spraying, make sure the temperature of the surface of the wood stove and the air are from 65 to 85 degrees.

It’s okay to soak the paint under hot water for 2 minutes to heat the paint. But avoid overheating or exposing it to an open flame. Is there anything to notice? Remember that the area should be well-ventilated and all open flames are extinguished. How to paint?

It’s best to test the high heat spray paint on a piece of cardboard to know whether it’s ready for use. Apply the first coat, wait about 15 minutes and then apply another one. When painting, make sure to do at a distance of 12-18 inches away from the stove.

Cure the paint:

Depending on the paint, it might require you to cure by heating the stove. You need to prepare a small kindling fire and then bring the wood stove temperature to 4500F. Keep it for about 1 hour. Next, add fuel to create a fire (6000F) and leave it about 45 minutes.

Paint A Wood Stove

Steps to paint a grill:

The finish of the grill easily deteriorates because of some reasons like weathering, the sun exposure, the wear and tear of use, etc. If your grill becomes terrible, you need to paint a new and fresh coat to bring its appearance back. And here is what you should do, guys.

Find an ideal place:

First of all, you need to choose an open and suitable location with enough airflow. It’s best to be outdoors to prevent paint fumes from spreading in your home. Then put a layer of trash bags or newspapers under the grill to prevent drips from landing on the ground.

Clean the grill:

The next step is to remove all stuck food particles, grimes and greases on the grill. Or it might leave a rough coat after painting. Wear rubber gloves and start scrubbing the inside and outside with a wire brush. For stubborn particles, try to mix warm water and liquid detergent and then soak it for some minutes before scrubbing again. After that, use a damp cloth to wipe the residue away and let it dry completely.

Start painting:

Before doing, you need to tape off parts of the grill that you don’t want to paint like knobs, handles, etc. Then apply the first coat! Hold a can of heat resistant spray primer about 12 inches away from the surface of the grill and spray.

Avoid spraying a particular spot too much to prevent dripping. So, it’s best to move the can slowly and steadily to give an even and complete coverage. After that, leave it to dry about 20 minutes. Next, use the heat resistant spray paint and start applying the second coat.

Do the same thing and let it dry from 40 minutes to 1 hour. Then you can repaint it until getting your desired look. Finally, allow the grill to dry overnight before using.

See also: How to Paint a Wood Fence by Paint Sprayer.

Steps to Paint a Steam Pipe

When you’re going to paint your steam pipe, make sure you perform it in the summer. If you do it in the winter, the moisture from condensation will cause the paint to cure inaccurately.

Turn off everything: Firstly, you need to turn off the furnace and all the water to the broiler. Then drain all the lines carefully.

Remove the old paint: Start scraping the pipe’s lengths that you want to paint and roughing up the surface. Make sure there is no old flaking paint so that the paint can adhere to it with ease.

Paint the steam pipe: Always apply a single coat of primer on the pipe and wait for it to dry before painting. After that, spray at least two coats to attain complete coverage. Make sure to leave each to dry completely. It’s best to start in the morning because this gives a more extended drying period.

Paint a Steam Pipe

Steps to Paint an Exhaust Pipe

Your exhaust pipe is another appliance that exposes to extreme conditions. Hence, if it becomes worn and grungy, spraying a fresh coat of the high temperature paint will make it look new.

Prepare: While painting, the first and foremost thing is to find in a well-ventilated area and use a drop cloth to prevent over-spraying. Cleaning the exhaust pipe with the specialized remover by spraying a coat over the whole pipe. Allow it to stand for 1 minute and wipe with a lint-free cloth. Don’t forget to tape off the surrounding parts of the car that you don’t want to paint.

Paint the exhaust pipe: Shake a can of high heat primer for 1 minute and then apply the first coat. Hold it about 8-12 inches away from the surface and spray in a steady motion. Apply 2-3 light coats and leave some minutes in between each. Then allow the primer to dry for at least 1 hour. After that, use the same technique and continue applying another 2-3 light coats of the high heat spray paint to your exhaust pipe. And let it dry about 1-2 hours.

Cure: Depending on the paint, you need to follow its instruction to finish the curing process.
Once everything is done, the pipe is ready for use.

Paint an Exhaust Pipe

Steps to Paint an Engine

Painting an engine and its parts is for both aesthetic and practical purposes. For instance, applying the paint on an engine blocks helps to stop the formation of rust. Or using the dark colors, mainly black, also contributes to offering better heat dissipation. So, how to paint the engine? Take a look at some steps below now!

Clean the engine: Cleaning before painting is a MUST, or the new paint cannot adhere to the engine well. Try to use a high-quality degreaser to remove built-up dirt and grease thoroughly. And don’t forget to remove the remained old paint by utilizing a paint thinner. Then let the engine completely dry before doing.

Paint the engine:
If you need a primer for a better and longer lasting result, it’s not necessary for the engine. Since the engines are made of cast aluminum or cast iron, the paint can adhere to these materials with ease. And this lessens the overall thickness of the paint.

There’s more to consider, the paint needs to be applied when the outdoor temperature is from 50 to 900F, and a humidity rating is below 85%. Relying on that, the paint will dry and cure accurately. After that, start spraying the paint as we mentioned above. Apply at least three coats and allow each to dry completely.

Paint an Engine

Steps to Paint a Radiator

Now, we will guide you how to turn your old radiator into a new one with the certain spray paint products and techniques.

Prepare the place:

The first thing is to switch off and let the radiator cool before starting. Then put a dust sheet on the floor and spread newspapers between it and the wall. Also, don’t forget to choose a well-ventilated area and wear protective gears to work effectively.

Sand the radiator:

Try to scrape a small area on its surface with a screwdriver blade and check the flaking to know whether it had been painted or varnished before. If not, examine any pitting from heavy rust with sandpaper (from 40 to 60 grits). Then sand the surface with fine-grit sandpaper (from 80 to 120 grits) to remove rust and get a smooth surface. In case the radiator was painted, you need to check the existing paint for the lead by using a lead paint test kit.

  • If the test is positive, you need to use a professional refinisher to remove the paint.
  • If the test is negative, avail a putty knife to scrape away the paint from the surface. After that, sand it as we mentioned above.

Clean the radiator:

The next step is to wipe away the dust on the radiator’s surface. Soak a cloth in a mixture of mild detergent and warm water and then remove debris and dirt. After that, allow it to air dry completely.

Spray a coat of primer:

You need to prime it with an even coat before painting. Shake and hold the can upright and at a distance of 10-16 inches from the radiator. Then spray in a back-and-forth motion. This will not only give a fresh surface but also protect against upcoming rust issues. And let it dry thoroughly.

Paint the radiator:

Try to apply the same technique as the primer by spraying another coat of the heat resistance spray paint over the surface. Of course, you need to use the back-and-forth motion to get the smooth coating. Let the first one dry for 5-7 minutes (or according to the instructions of the paint) and then apply one or more to get the desired finish. Finally, allow it to dry completely.

How to Choose the High Heat Paint?

Understanding the demands of your appliances and the application process is vital for offering an accurate coating choice. Aside from knowing the appliance type, you should learn about its use, environments, coating time parameters, and so on. What to consider when selecting this paint? Let’s find the answer here!

Temperature range

This is the first and foremost consideration when choosing the high temp paint for the coating. At the low temperatures (under 4000F), organic materials are often used. But be careful when utilizing them at the high temperatures (above 4000F). In this case, the inorganic materials are better because they are similar to ceramic and silicone, allowing for extreme temperature resistance.

Coating environment

There are 3 main coating environments that you should consider, including:

Indoor: The indoor appliances are mainly stoves, fireplaces, etc. These only require a lighter coat of the high temperature paint to protect. And you don’t need to cure since there is often no water exposure inside.

Light outdoor: The light outdoor appliances are often fire pits, grills, smokers, etc. These often need a heavier grade coat to deal with rainwater and UV rays. Normally, the paint has to be cured to protect the prolonged water exposure.

Heavy outdoor: The heavy outdoor appliances are engines, exhaust systems, stacks, kilns, etc. Of course, these require industrial high-temperature coat to stand up the very high temps.

Aesthetics

Aesthetics guarantees that the painted appliance keeps the color you selected. Importantly, it enhances safety.

Company’s popularity

Most of the company claim that their products are the best; however, you have to ensure that they are certified. Try to do an online search for this company to know about their reputation. For instance,

  • Do they have lots of satisfied customers?
  • Are there any BIG problems in their past?
  • Etc.

What are Precautions of Using the High Heat Spray Paint?

When using this kind of paint, there are necessary precautions that you should consider. If you follow us from the beginning, you might find some. But allow us to summarize all so that you get a general and better view.

Do not apply to a hot surface

Always ensure surfaces and contents of appliances to be painted have cooled down. Avoid using the paint unless the surface temp is between 60 and 900F.

Prepare everything carefully before spraying

Remove all rust, grease, oil, dirt, dust, and loose paint from the surface. Rough up any glossy paint with sandpaper. Tape off parts not be painted. Protect surrounding places with newspapers or drop cloth.

Protect yourself with required gears such as gloves, masks, etc. And don’t forget to choose a well-ventilated room with the room temp between 60 to 800F.

Shake well and paint

Remember to shake the can of high heat spray paint about 1 minute to mix ball rattles well before painting. This guarantees accurate mixing and prevents the paint from clogging. When spraying, you should shake frequently.

Always hold the can 12-15 inches from the surface and paint by using even and steady strokes. Apply at least two light coats and leave each 10 minutes to dry. Make sure to clean the spray head instantly after using by turning the can upside down and spraying until seeing no more paint.

In case you catch the clogging, please remove the spray head and clean it with a fine wire. Never point the can and spray head toward you while replacing, or undesired issues might happen.

Other precautions

When the can is out of the paint, you need to discard it according to applicable regulations. NEVER burn or put it in your home garbage compactor.

See more: Top 5 Best Safety Painters Mask for Spray Painting.

On a Final Note

Using high temp paint offers aesthetic and durable protection for lots of surfaces that are exposed to extreme temperatures for sure. And this type of paint always features its better color stability, the higher film builds, and enhanced flexibility.

If you are going to paint your house appliances, you can follow our steps above. Or assume you still have any query related to this topic, simply leave your comments in the box below. We’re always willing to support you. Once again, thanks for reading, guys!