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Why Does My Airless Paint Sprayer Leaving Streaks? Uncover The Truth

You are interested in decorating and fixing your house by yourself and equipped with a sprayer for your hobbies. However, your kind of tool has recently had some troubles that make you keep asking yourself, “Why does my airless paint sprayer leaving streaks?

Well, don’t look any further than this post! Here we will explain the root causes and then give you some solutions to deal with this problem.


An airless paint sprayer is a handy appliance in the house.


What Is The Airless Paint Sprayer Streaks?

The airless paint sprayer streaks appear when your spray pattern’s edges are spotty compared to the remaining of the airless sprayer fan. The final outcome comes with some unexpected lines at the border of your painting spray pattern.

Or we also can say that the liquid is being compelled through the airless sprayer’s liquid tip improperly, which results in the paint being atomized unevenly, or people call this trouble as streaks.

You can clearly see the airless paint sprayer streaks through in the below picture.


Streaks from airless paint sprayers

Why Does My Airless Paint Sprayer Leaving Streaks?

There are three key roots of disturbances and streaks in your spray pattern when you use an airless tool, particularly:

  • Too low pressure
  • Nozzle worn
  • Material supply disruption (or called blocked filters)

Now we are going to dig in detail about each of these causes to explain why your airless sprayer leaves streaks.

The most popular reason for streaks on the pattern from your airless sprayer is related to pressure being too low, as you didn’t increase the pressure high enough to offer appropriate even atomization of the layer throughout that pattern.


Why does my airless paint sprayer leaving streaks?

Another cause resulting in the low-pressure situation of your paint spray machine is spraying tip size, which also contributes to the abrasion of the nozzle.

These paint spray tools are now considered to have the largest tip. If you use any tip greater than the largest size or worn bigger, it will result in low pressure. Furthermore, the tip ought to have an adequate size with the material types being applied to reach the right speed for its operation.


An airless paint sprayer would deteriorate after using it for a long time.

In addition, after using it for a long time, your paint spray would also deteriorate, leading to a poor spray pattern and decreasing the pressure of sprayers.

Last but not least, material supply disruption also produces streaks in the spray pattern. Because applying too thick material could affect the paint delivery rate, clogging your airless paint spraying filter and leaving streaks.

What Can I Do To Address These Mistakes From My Airless Paint Sprayer?

Now, it’s the right time to reveal thoughtful methods to overcome these troubles!

The first simple solution to deal with the issue is to boost adequate pressure on the airless paint sprayer. This can help us to make sure that the fluid would be completely atomized evenly onto surfaces.

In case your tip has been worn larger than normal, you should give it sufficient time so that the spray would allow the paint to permeate into the tip properly.

You need to know that when the nozzle is abraded, your spray tip should have a little more time to paint traveling into the tip and spray properly on surfaces. However, if the problem still impacts the effectiveness of your spray continually, then you should consider replacing a new paint spray tip with the smaller width of its fan for the next spraying time.

There are two key sorts of paint spray tips in the current market. Particularly, the normal spray tip requires the airless spraying pressure of at least 1450psi (around 100 bar) and gets the atomization evenly. Meanwhile, the edge-cutting finish airless spray tips only require the pressure of approximately 870 – 1000psi ( around 60 – 70bar ) for reaching equal atomization.


Thin a material is a good way to resolve streaks from your airless paint sprayer.

What about the last common cause – material supply disruption? Well, to deal with it, you are highly recommended to thin the material you are utilizing for your airless paint sprayer. Be noted that you should not forget to boost your airless paint sprayer to its maximal capacity when you apply this way to handle some streaks from your sprayer.

In addition, checking your machine’s (spray gun and manifold) filters should be your priority in this method. This step will allow you to see whether the paint moving through your spray is clogged somewhere or not. As a result, you can ensure that the material or paint comes through smoothly inside your machine and unblock anywhere in that movement.

And last but not least, choosing premium quality paints is also a good resort to prevent streaks from your sprayer. There is a truth that high-quality paints would have less risk of clogging your paint spray tip. This will assist lessen troubles with streaks and enhance the lifespan of spray layers longer.

If you have done all the solutions as mentioned above yet the issue is still with you, it’s time to get a new sprayer. In that time, you will no longer wonder whether your airless paint sprayer is compatible with thick materials or whether it has a big paint spray tip or not.

Final Says

Until these last sentences, we believe that you have already had a thoughtful answer for your initial curiosity “Why does my airless paint sprayer leaving streaks?“. Hopefully, you are now more confident to decorate your own house when you reach the helpful knowledge for using this handy appliance from our article.

Thank you for staying with us. If you feel that the blog brought handy information, don’t forget to follow us and share this with others.

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