how to clean watercolor brushes

How to Clean Watercolor Brushes the Easy Way

You can easily spend a small fortune on brushes. So if you want your investment to last, it’s probably a good idea to learn how to clean your watercolor brushes and generally take care of them.

With a little care and attention a good brush can last for years. I still use some sable brushes which I bought decades ago! (Yes… you did read that correctly!) 

Compared to other mediums like oil and acrylic painting, watercolors are less harsh and generally friendlier to your brushes. After all, watercolors are water soluble, making it easier to keep brushes clean, even with everyday use.

But the danger occurs when deposits of paint and other debris build up over time, and there are also some essential rules to keep in mind for day to day brush care. 

A few good habits and an occasional cleaning routine will keep your brushes in good order for years to come!

How to Clean Watercolor Paint Brushes

Before we get into the nitty gritty of cleaning, let’s quickly go over the anatomy of a watercolor brush. It will be handy to know a few terms or you may not understand what I’m talking about later on (heaven forbid).

​The hairs themselves are referred to as the , and this is subdivided into the and the .

Anatomy of a Watercolor Brush

anatomy of a watercolor brush

First there’s the handle. That bit’s not too tricky. Then as you work your way along you have the metal part which attaches the hairs to the handle. This is known as the ferrule. The part where the ferrule meets the handle is called the crimp

​The hairs themselves are referred to as the head (also sometimes called the tuft), and this is subdivided into the tip and the belly.

​A quick tip when you choose your brushes. Don’t buy brushes where the ferrule isn’t one continuous piece of metal. Some brushes have split ferrules which more easily come loose. The importance of the ferrule is to keep everything in place!

Why you should Clean your Watercolor Brushes

Watercolor brushes are quite unique because of their softness. Better quality brushes use natural hair such as sable or squirrel. This natural hair is fine and delicate and can be damaged. But even synthetic hairs will need cleaning occasionally.

Over time, pigment, paint binders, and other dust and dirt tends to accumulate in the brush hairs, especially near the ferrule. Paint particles are difficult to remove from the base of the brush head near the ferrule, and even if you rinse your brushes regularly you’ll find that paint builds up in this spot.

This build up of particles near the ferrule forces the hairs further apart, and over time can end up deforming the brush. 

Furthermore, some paint pigments are more staining than others (the phthalo family of pigments for example). This can discolor the hairs of your brush so much that a good clean with soap is needed from time to time.

How Often to Clean Brushes

You’ll find it isn’t necessary to wash brushes after each painting session. 

When you finish painting, simply rinse them well, then reform the tip and leave them to dry on a flat surface. 

Depending on how often you use a brush, your cleaning routine should only be occasional. Cleaning too often is pointless. I probably only clean my brushes every three to four months

Easy Way to Clean Watercolor Brushes

Probably the best way to clean your brushes is using a mild soap. Make sure your soap is of the mild variety. For example something that uses vegetable based oils and contains no additives. You don’t want to use anything too aggressive.

Here’s the method I use when cleaning my brushes:

  1. 1
    ​I like to use a clean white plate or a ceramic mixing tray to work the soap into the hairs. The white surface will let you see how much pigment comes out of the brush during cleaning.
  2. 2
    ​Dip the brush in water and make sure it’s well soaked. You can gently squeeze the brush to make sure there are no air bubbles trapped between the hairs (don’t pull the tuft). Repeat the process of dipping and squeezing until the hairs are thoroughly soaked.
  3. 3
    ​Put a little soap on the brush when its wet, just pick up some soap as if you were picking up paint from your palette.
  4. 4
    Rotate the brush in circles so that the brush hairs are pulled along their length. You should not hold the brush vertically and splay the hairs on the surface. You’re trying to follow the natural direction of the brush hairs.
  5. 5
    ​Rinse and repeat. Pick up more soap and push the brush down to apply slight pressure to the hairs near the ferrule. Remember you don’t want to crush the hairs so that they splay outwards a lot because this could deform the head. Turn the handle and work the soap into different sides of the brush.
how to clean watercolor brushes step by step

Commercial Brush Cleaners

I would recommend you try mild soap before any other type of commercial cleaner. 

You can find some special brush cleaning products such as the “Masters brush cleaner and preservative”, but keep in mind this kind of product contains some abrasive ingredients. 

Did you leave your brush all week soaked with paint? If you forget to clean a brush and it needs recovering, rather than just washing, in this case you could try something like the Masters Brush Cleaner (you can find it here on Amazon).

How to Care for Watercolor Brushes

Watercolor brush care just means picking up some good habits, and avoiding doing anything dumb ! I’m sure you know what I’m talking about… Yes you ! 

Here are some day to day tips on how to care for your precious brushes so they live long and happy lives!

  • ​The first tip is to never leave your brushes standing head down in a jar of rinse water. Nope… Never! It’ll deform the head. And strangely, synthetic brushes are even more susceptible than natural haired brushes.
  • Only use your brushes for watercolors. Gouache is OK because it’s water soluble like watercolors. But don’t be tempted to use brushes with any unusual type of paint. And certainly not with liquid frisket!
  • Lay brushes flat to dry. A lot of people leave their brushes upright in a pot. This will just encourage water to seep down into the ferrule. Over time the moisture can loosen the ferrule and damage the wooden handle.
  • Rinse your brushes as you work. If you lay down a brush to do something else, or to change brushes, rinse it first then lay it flat. I use a brush rest to hold my brushes while I work. This keeps the damp heads floating in the air so they dry better.
  • ​When you pick up paint from the wells of a mixing palette or from pans, don’t push the head down hard into the paint. If you splay the hairs into the wet paint it will force pigment up towards the ferrule. You can also do damage to the hairs by pressing too hard.
  • When you finish a painting session always rinse you brushes completely in clean water. I always run them under a stream of luke tap water until all the pigment runs out.
  • After rinsing reform the tip of your brush. Gently squeeze the hairs to remove excess water then use your fingers to reform the head into a sharp tip. Leave them to dry on a flat surface.
  • Don’t store a damp brush in any kind of container. Wait until they’re dry or you could have problems with mildew attacking the brush hairs.
  • ​When you’re not using brushes store them in a place where they won’t get damaged!
how to care for watercolor brushes step by step guide

Brush Storage

If you start to build up a collection of brushes (and I have to admit I’m a sucker for buying nice brushes), you’ll need a good place to store them.

A roll-up brush holder is one of the best alternatives for storage. Traditionally these are made out of bamboo, but nowadays you can find some excellent fabric roll-up holders, like this one on Amazon

If you know you’re not going to use a brush for a certain period of time you might consider protecting the hairs with gum arabic. You may have noticed when you buy a new watercolor brush that the hairs are glued together and hard. This is because they are coated with a gum arabic solution to protect them during shipping.

You can use the same stuff to protect your delicate brushes for long periods of storage or when traveling. Check the labels when you buy your gum arabic since sometimes it’s sold in granular form which needs mixing. I prefer the liquid form like this one by Winsor & Newton (links to Amazon).

gum arabic

How to Reshape Watercolor Brushes

The shape of your brushes is possibly more important than their cleanliness! After all, the brush strokes you produce depend heavily on the form and handling quality of your brush

​A lot of people underestimate the influence their brushes have on their work. It’s very difficult to obtain decent results with poor quality brushes.


The first rule of thumb is to reshape your brushes after every painting session.

After rinsing the brush, use your fingers to form a pointed tip, by pulling the hairs from the belly towards the tip. There should be no stray hairs pointing out.

But should you find yourself in the unfortunate situation where one of your favorite brushes has lost its shape, do not despair. You may still be able to recover your beloved friend!

This is where gum arabic can come in handy again. As well as protecting brush heads during storage you can also use this substance to try to recover the shape of a deformed brush.

Fully emerge the head of the brush in the liquid gum arabic. Then simply use your fingers to reshape the brush and leave it to dry. The gum arabic will harden, keeping the hairs in shape. 

Leave the brush for a few days, then just rinse with water to remove the gum arabic before use. 

You can also buy specially formulated products for reshaping brushes such as the Speedball Brush Restoration product (here's the link to Amazon if you need it).

​Some people even use hair gel to restore their brush heads! After all, if it’s good enough for your head, it shouldn’t do any hard to your brushes...

Look after your Brushes!

Dry pigment doesn’t really affect the performance of your brushes. But a decent clean every once in awhile will keep your best brushes going for many years. 

Cleaning is a worthwhile way to protect the investment you make in expensive watercolor brushes. You ‘ll be better off in the long run. Which do you prefer? Buying new cheap synthetic brushes every year, or caring for an expensive kolinsky sable brush that lasts decades?

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