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How To Make Interior Paints [The Total Procedure]

Let’s start with a true story. A week ago, I wanted to paint the exterior of my house so decided to go and buy some exterior paint of good quality.

Just then, I remembered that I had just painted the interior of my home half a month ago, and I had a lot of extra interior paints stored in the storehouse.

Then why waste money unnecessarily? Why not using them to paint the exterior? Doing so might save lots of money. So, how to make interior paints?

But the question is –can we make interior paint into exterior paint? No, I will not tell it now. At first, let’s know some basic facts which we must know before taking the ultimate decision. Firstly, let me tell you what interior and exterior paint are and the fundamental difference between them.

How To Make Interior Paints

Differences Between Exterior And Interior Paints:

Differences Between Exterior And Interior Paints:

Exterior paint is the paint that is used to paint the outside walls of your dearest home. Hence the foremost agenda of exterior paint is to protect your house against moisture in a better way. It acts as a barrier against rain, snow, sunlight, UV ray, and fungal growth so that nothing can diminish the glaze of your beloved home.

On the other hand, interior paint is the paint that we use to make our rooms more colorful, more vibrant- in short, more aesthetic and lively for decorative purposes.

So we have no liability to make it heat or radiation-proof. Instead, it has to be easily washable, easy to maintain, odor-less, dampness proof, good for health, and environment friendly. So that it can give the interior of our house a stable, appealing, and mesmerizing look and give us a safer risk-free-breathing environment and give our guests and us a pleasant feeling.

In most cases, exterior and interior paint have maximum common ingredients like pigments, solvents, resin, and additives. But there remain a few differences. And the most significant difference which makes them different is the use of ‘resin’ and ‘additives

The resin’s paramount quality acts as a binding component to bind the paint with the surface on which we are painting. The use of wax in exterior paint is softer and flexible (acrylic resins, 100%) to withstand heat, moisture, and radiation and prevent cracking and fading. It is alkali resistant and provides better adhesion.

But interior paint uses more rigid and harder resin to resist staining and make it easily cleanable. Interior paint doesn’t have any pressure to prevent cracking, heat, or radiation, so it uses flexible resin. The resins in exterior colors may cause outgassing which is harmful to our health, so interior paints have a different formula for using resins.

When it comes to choosing exterior paint additives, some environment-specific additives are more preferable as they provide better weather resistance, keep the exterior dry as much as is needed, and evenly distribute the pigments in the solution.

So, exterior paints can easily endure extreme weather. Interior colors don’t contain these additives, so they can’t give such protections if used on the exterior. Moreover, these additives aren’t safe for our health, so they may cause serious health hazards if used in interior paints. So, interior colors don’t contain such additives, and they contain additives that aren’t so strong and safe for our health.

Again, interior paint must be more environmentally friendly, safer, and breathable, producing less volatile organic compounds and fewer odors. Conversely, exterior paint with no such limitation produces more of it and prioritizes being harder and being less crack-able over environmental safety.

And so oil-based paints, which have an odor, can be used in exterior paint but are not preferable to be used in interior colors, and also these external paints aren’t easily cleanable.

So, we can say interior paint is more environment-friendly and safe. On the other side, exterior paint though not safe for breathing, can protect us from the notorious hazards of UV radiation and protect our house from constantly changing temperature and humidity.

So many differences !!! But the question remains the same can we neglect these differences? Can we do some modifications to make interior paint into exterior? To know, let’s read some more-

Can We Use Interior Paint As Exterior Paint?

Can We Use Interior Paint As Exterior Paint

What is your opinion after all these conversations? It’s ok, take your time to do the calculation and meanwhile let me tell you the experts’ opinion-

First of all, as we have written above, the paints’ components are not the same, so their quality and characteristics also differ. When made, a lot of research is done beforehand to make them perfect to meet their different purposes and make them more precise.

So undoubtedly, they are best when used for their definite purpose. Suppose we use interior paint on the exterior. In that case, there will be so many disadvantages. Interior paints contain a rigid amount of resin, so they can’t protect the surface of our house from humidity, heat, UV rays, and rain as efficiently as exterior paint. So, our home’s exterior will become more fragile and will fade out soon. This kind of incident is not preferable.

Moreover, as mentioned earlier, the additives used in exterior paint have to be more vital to give adequate resistance, which isn’t present in interior color. If we use it on the exterior, it may not provide enough resistance.

So experts say, though we can use interior paint on the exterior, it’s better not to do so. Instead, we can use universal color, which is made to meet both purposes.

Now you might be thinking- what did I do? I saved those paints for future use and bought new exterior colors to paint the exterior. Cause for me, I may compromise with my budget, but I’ll never compromise with the quality of my home.


I hope now you know how to make interior paints.

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