How to Care for Your Watercolor Brushes: Cleaning, Storage and Longevity Tips

A quality watercolor brush can last years with proper care – or months with neglect. The difference is not complicated: a few simple habits after each painting session protect your investment and keep your brushes performing at their best. Whether you use natural hair or synthetic brushes, the care principles are similar with a few important differences.

Daily Cleaning Routine

Step 1: Rinse During Painting

Swirl your brush gently in clean water between colours. Do not smash the brush against the bottom of your water cup – this bends and breaks hairs. A gentle swirl and press against the cup’s side is enough to release most pigment.

Step 2: Post-Session Rinse

After your last brushstroke, rinse each brush under lukewarm running water. Hold the brush pointing downward so water flows from the ferrule (metal band) toward the tip. Keep rinsing until the water runs completely clear.

Step 3: Remove Stubborn Pigment

If colour remains in the brush after rinsing, work a small amount of gentle soap or brush cleaner into the hairs using your palm. Lather gently in circular motions, rinse, and repeat if needed. Purpose-made brush soap is ideal, but a mild hand soap works in a pinch.

Step 4: Reshape

Before the brush dries, reshape the tip with your fingers. For round brushes, form a point. For flats, press the hairs into a clean edge. The brush dries in the shape you set – if you skip this step, the hairs dry splayed out and may not return to a proper point.

Step 5: Dry Properly

Lay brushes flat on a towel or hang them tip-down in a brush holder. Never store wet brushes standing upright in a jar – water seeps into the ferrule, dissolves the adhesive holding the hairs, and loosens the handle. This is the number one cause of premature brush death.

Deep Cleaning: Removing Dried Paint

Sometimes pigment dries deep in the bristles, especially with staining pigments like Phthalo Blue or Alizarin Crimson. Deep cleaning restores these brushes:

1. Soak in lukewarm water for 5-10 minutes. Never use hot water – it damages both natural and synthetic hairs
2. Apply brush soap and work it into the hairs with your fingers. Press the brush gently against your palm to work soap deep into the belly
3. Rinse and repeat until no colour appears in the lather. Staining pigments may leave a faint tint in natural hair brushes – this is cosmetic only and does not affect performance
4. For severely caked brushes, soak in a brush-cleaning solution overnight. Avoid solvents meant for oil paint brushes – they can dissolve synthetic fibres and strip natural oils from hair brushes

Natural Hair Brush Care Specifics

Natural hair brushes (kolinsky, squirrel, goat, ox) require a bit more attention than synthetics:

• Condition occasionally: Natural hair benefits from a light conditioner or brush soap left in the hairs between sessions (about once a month). This keeps the hairs flexible and prevents brittleness
• Avoid prolonged soaking: While occasional soaking is fine for cleaning, leaving a natural hair brush in water for hours swells the ferrule and can permanently damage the shape
• Store away from moths: Natural hair brushes are protein fibres. In humid climates like Sri Lanka, moths can damage stored brushes. Keep them in a sealed case or with cedar blocks nearby
• Handle temperature carefully: Hot water strips natural oils. Always use lukewarm or cool water for cleaning

The ArtSecret squirrel hair wash brush and similar premium brushes particularly benefit from these natural hair care practices.

Synthetic Brush Care Specifics

Synthetic brushes are more resilient but not indestructible:

• Heat sensitivity: Synthetic fibres can deform permanently if exposed to hot water or left near a heat source. Once bent, the shape cannot be restored
• No conditioning needed: Synthetic fibres do not dry out like natural hair. Soap and water cleaning is sufficient
• Tip wear: Synthetic brushes lose their fine point faster than natural hair brushes. Proper cleaning helps, but eventual replacement is normal
• Stain resistance: Synthetic fibres stain less than natural hair. However, Phthalo pigments can still permanently tint light-coloured synthetic hairs

Storage Solutions

At Home / Studio

• Best: Hang brushes tip-down from a brush rack or clip stand. Gravity keeps moisture away from the ferrule
• Good: Lay flat in a drawer or on a shelf. Simple and effective
• Acceptable: Stand upright in a jar or holder – but ONLY when completely dry
• Never: Store wet brushes upright. Never store with tips pressed against a surface

For Travel

Use a brush roll or bamboo mat case. These hold brushes flat and protect the tips. Ensure brushes are completely dry before rolling up – trapping moisture in a closed case promotes mould growth, especially in Sri Lanka’s humid climate.

Water brush pens are the easiest option for travel: cap them, toss them in a bag, and they are virtually indestructible.

Common Mistakes That Damage Brushes

1. Smashing Into the Water Cup

Pushing the brush forcefully against the bottom or sides of your water container bends and breaks hairs. Swirl gently instead.

2. Leaving Brushes in Water

Even 10 minutes standing in a water cup during a painting session bends the tip as it rests against the bottom. Lay brushes flat when not actively using them.

3. Using Brushes to Scrub

Scrubbing paper aggressively to lift colour or create texture damages both the brush and the paper. Use a dedicated old brush for scrubbing techniques, not your painting brushes.

4. Skipping the Reshape

A brush that dries unshaped develops a permanent memory for that splayed shape. The more sessions you skip reshaping, the harder it becomes to get a clean point back.

5. Storing with Caps On

Brush caps are for shipping protection only. Storing brushes with caps on traps moisture, promotes mould, and crushes the hairs out of shape. Remove caps after purchase and discard them.

6. Using Watercolor Brushes for Acrylic or Oil

Acrylic paint dries to plastic in the hairs. Oil paint requires solvents that damage watercolor brushes. Keep separate brushes for each medium.

When to Replace a Brush

Even well-maintained brushes eventually wear out. Replace a brush when:

• A round brush no longer points, even after reshaping
• The belly has lost spring and does not return to shape when pressed
• Hairs fall out frequently (a few stray hairs are normal, clumps are not)
• The ferrule has loosened from the handle
• You cannot achieve the marks you need

Demote worn brushes to masking fluid application, scrubbing, or mixing duties rather than discarding them. They still have utility until the hairs are truly gone.

Quick Reference: Care by Brush Type

Brush Type	Water Temp	Conditioning	Expected Life
Kolinsky sable	Lukewarm only	Monthly	5-10+ years
Squirrel hair	Lukewarm only	Monthly	3-5 years
Goat/Chinese brush	Lukewarm only	Occasionally	2-4 years
Synthetic round	Cool to lukewarm	Not needed	1-3 years
Synthetic flat	Cool to lukewarm	Not needed	1-3 years
Water brush pen	Cool rinse	Not needed	1-2 years

Investing a few minutes in brush care after each painting session pays dividends. Your brushes keep their shape, hold water properly, and make the marks you expect. Considering that a set of quality brushes from our brush collection represents a real investment, protecting that investment with proper care simply makes sense.

Frequently Asked Questions

Can I use dish soap to clean brushes?

In a pinch, yes – a mild, unscented dish soap works. However, it can be harsher than dedicated brush soap and may strip natural oils from hair brushes over time. Purpose-made brush soap or a gentle hand soap is better for regular use.

My brush tip is permanently bent. Can I fix it?

Soak the brush in lukewarm water for 15 minutes, then reshape and let it dry. If the bend remains, try soaking overnight in a brush cleaner solution. For synthetic brushes, a permanent bend usually means replacement. For natural hair, longer soaking often restores the shape.

Is it worth caring for cheap brushes?

Basic care (rinsing, reshaping, proper drying) takes under a minute per brush and helps even inexpensive brushes last longer. Skip deep conditioning for very cheap synthetics, but never skip daily cleaning – paint dried in any brush shortens its useful life.