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The Daily Horizon

What can I use to thin paint for spraying?

Author

Jessica Wood

Updated on January 19, 2026

To thin the paint, you can go for 20% water and the paint should spray fine. However, if for some reason, you use an airless system to spray oil-based paint, the paint does not need to be thinned before application.

What do you use to thin paint for a paint sprayer?

Add ½ cup (118 milliliters) of water for every gallon of paint. Mix thoroughly. Check the thickness by running the paint through a funnel. If it flows freely through the funnel, you know the paint is thinned enough.

Can you use normal paint in a spray gun?

An airless sprayer will spray any normal paint without thinning, emulsions and satin will spray perfectly, and you will get a great finish.

What is used to thin acrylic paint?

There are two choices for thinning acrylic paint: water or acrylic medium. Water breaks down the binder in acrylic, thinning the paint so that it looks like watercolor and allows it to sink into the surface, resulting in a matte finish.

Should I thin paint before spraying?

Is it necessary to Thin Latex Paint for Spraying? Yes, the latex paint does need to be thinned. Even though latex paint is water-based, it is thicker than the oil-based paint varieties. The thick latex paint needs to be thinned to be able to spray a fine mist of paint.

How to: Quickly Thin Paint to Spray Through a HVLP Gun

What viscosity should paint be to spray?

There is a rule of thumb in the paint industry that a viscosity of approximately 100 cps (1 P, 0.1 Pa•s) provides acceptable spraying, brushing, or roll coating.

Can you put paint in a spray bottle?

Spray bottles (empty window cleaner bottles work well) Thin paint. (This can be water-based paint of any kind. If you use tempera or acrylic, make sure to add lots of water so the paint is very, very thin.)

Can I add water to thick paint?

Add more water if needed.

If the latex paint is still too thick, measure out an additional half cup of water per gallon of paint. Incorporate the room temperature water in increments while mixing until you achieve the desired consistency. Repeat the funnel test to measure the paint's viscosity.

Do you need to thin acrylic paint for a sprayer?

If you want to control the results, even application and paint consistency, you need to thin acrylic paint for spraying. You also should consider thinning when the weather makes your paint thicker (temperature, humidity, and air pressure).

Can you use mineral spirits to thin paint?

Mineral spirits is a clean, clear product that's used for thinning oil-based paint. It can also be used for thinning or cleaning stains and varnishes, as well as for cleaning up oil stains or spills. When thinning paint with pure mineral spirits, start with 4 ounces of mineral spirits per gallon of paint.

Can I add paint thinner to paint?

To mix the paint and thinner, follow all manufacturer directions and measure out the prescribed paint amount and pour it into a mixing bucket. Add the right amount of thinner a little bit at a time as you stir with a paint stirrer. Mix the paint and thinner for several minutes, checking the consistency periodically.

What kind of paint do you use in a spray gun?

Pneumatic paint sprayers work with oil-based enamel, acrylic and latex paints.

How do you make paint thinner?

If you want to make paint thinner, try using mineral spirits or acetone, which you can purchase from a hardware store. First, measure out the spirits or acetone in a separate container so you have 3 parts paint to 1 part thinner. Then, pour half of your chosen thinner into your paint and stir thoroughly.

Does thinning paint change the color?

When you water down exterior paint, it changes the color by making it lighter. This means that the end result often differs from the sample patches or the digital renderings, if the contractor provided them at all. Watered-down paint also causes inconsistencies, especially when the water and paint are poorly mixed.

Why is my paint sprayer spitting?

“Spitting” happens when your paint gun's nozzle is not properly screwed into place. If your paint gun is spitting or dripping paint, it is probably because the nozzle is not screwed on tightly. If you've checked your nozzle and find that it is screwed on tightly, you may need to purchase a new nozzle altogether.

How do you thin latex paint for spraying HVLP?

Start by thinning the paint by adding 10 percent water and mixing thoroughly. If the paint is still too thick, add a small amount of water and mix again. Do not use more than 25 percent water in any paint. Excessive thinning reduces the paint's ability to adhere to and cover a surface.

How much thinners do I mix with acrylic paint?

We recommend using a minimum of 1 part GOLDEN Medium to 10 parts water to thin acrylics above a 1:20 ratio, or whenever more durability is needed.

How much paint is needed to thin a spray gun?

A simple rule of thumb is always thin emulsion before spraying through an airless sprayer, at least by 10%. Second, you have finish paints for woodwork. Typically, water-based satin these days. When spraying woodwork with satin, you would not thin the paint at all.

Can you use acetone as paint thinner?

Acetone nail polish remover can be used to thin paint or clean up spatters and spills. Most nail polish removers have acetone as a primary active ingredient. Acetone is a powerful solvent for both oil-based and latex-based paint, and can be used to remove uncured paint from a wide variety of surfaces.