What can I use to thin paint for spraying?
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.