verifiedUpdated March 2026 · Expert Tested

Best Water Brushes (Refillable) 2026

Water brushes put a refillable water supply right in the handle, letting you paint anywhere without cups, jars, or spills. We tested every major water brush pen to find the five that deliver the best flow control, tip quality, and overall convenience.

By Best Watercolor Brushes Editorial Team · Last Updated March 2026

updateLast Updated: March 26, 2026verifiedTested by: BWB Editorial Teambrush5 brushes testedschedule10 min read
emoji_events

Quick Verdict

The Pentel Aquash is the best water brush for most painters, with great flow control, four tip sizes, and a hard-to-beat price. For finer control and calligraphy work, the Kuretake Water Brush has a firmer tip that serious sketchers will prefer.

Top Water Brush Picks at a Glance

Best Overall
Pentel Aquash

Pentel Aquash

star9/10

Synthetic Nylon

$5–10

Check Price on Amazon
Best for Control
Kuretake Water Brush

Kuretake Water Brush

star8.8/10

Synthetic Nylon

$6–12

Check Price on Amazon
Best Value
Sakura Koi Water Brush

Sakura Koi Water Brush

star8.5/10

Synthetic Nylon

$4–8

Check Price on Amazon

Water Brush Comparison

BrushMechanismPriceRatingBest For
Pentel AquashSqueeze barrel$5–109.0Best overall
KuretakeSqueeze barrel$6–128.8Best for control
Sakura KoiSqueeze barrel$4–88.5Best value
Derwent Push-ButtonPush-button valve$8–148.2Best precision flow
Molotow Aqua SqueezeSoft-body squeeze$6–128.0Most versatile

In-Depth Water Brush Reviews

Pentel Aquash Water Brush
9/10
#1

Pentel Aquash Water Brush

Tip MaterialSynthetic Nylon
Barrel TypeRefillable, squeezable
Tip SizesFine, Medium, Broad, Flat
CapacityApprox. 7ml
Price Range$5–10
Made InJapan
Pros
  • checkThe original and still the best water brush
  • checkFour tip sizes available
  • checkExcellent water flow control
  • checkVery affordable
Cons
  • closeBarrel can leak if over-squeezed
  • closeNylon tip wears with heavy use

Our Take

The Pentel Aquash is the water brush that started it all, and it remains the best option for most painters. The squeezable barrel delivers a controllable flow of water to the synthetic nylon tip, letting you paint anywhere without a water cup. Fill it with clean water and activate watercolor pans directly, or pre-load with diluted ink for wash work. The medium tip is the most versatile, but having all four sizes gives you genuine range from fine lines to broad washes. At under $10, there is no reason not to have one in your bag.

Check Price on Amazonarrow_forward
Kuretake Water Brush
8.8/10
#2

Kuretake Water Brush

Tip MaterialSynthetic Nylon
Barrel TypeRefillable, squeezable
Tip SizesSmall, Medium, Large
CapacityApprox. 5ml
Price Range$6–12
Made InJapan
Pros
  • checkFiner tip than Pentel for more control
  • checkFirmer nylon for precise lines
  • checkGood build quality
  • checkExcellent for calligraphy and lettering
  • checkComfortable grip for extended sessions
Cons
  • closeSmaller water capacity than Pentel

Our Take

Kuretake brings their calligraphy heritage to the water brush, and it shows in the tip design. The nylon fibers are slightly firmer than the Pentel Aquash, giving you more control over fine lines and precise mark-making. If you use water brushes for lettering, calligraphy, or detailed sketching alongside watercolor, the Kuretake's firmer tip will feel more responsive. The smaller barrel means more frequent refills, which is the main trade-off.

Check Price on Amazonarrow_forward
Sakura Koi Water Brush
8.5/10
#3

Sakura Koi Water Brush

Tip MaterialSynthetic Nylon
Barrel TypeRefillable, squeezable
Tip SizesSmall, Medium, Large, Flat
CapacityApprox. 4ml (Small) – 9ml (Large)
Price Range$4–8
Made InJapan
Pros
  • checkMost affordable water brush option
  • checkFour sizes including a flat tip
  • checkGood basic water flow control
  • checkPairs naturally with Sakura Koi watercolors
Cons
  • closeTip slightly less refined than Pentel or Kuretake
  • closeSmaller barrel on fine tip version

Our Take

The Koi tip is slightly softer and less refined than the Pentel or Kuretake — but for the price, that is easy to overlook. You can buy a set of three sizes for roughly the price of a single premium water brush.

Check Price on Amazonarrow_forward
Derwent Push-Button Water Brush
8.2/10
#4

Derwent Push-Button Water Brush

Tip MaterialSynthetic Nylon
Barrel TypeRefillable, push-button valve
Tip SizesFine, Medium, Chisel
CapacityApprox. 8ml
Price Range$8–14
Made InUK
Pros
  • checkPush-button valve prevents accidental flooding
  • checkPrecise water delivery on demand
  • checkGood capacity barrel
Cons
  • closeButton mechanism can feel stiff initially
  • closePricier than Japanese alternatives

Our Take

The Derwent Push-Button takes a different approach to water delivery by replacing the squeeze barrel with a push-button valve. Press the button and water flows. Release and it stops. This eliminates the accidental flooding that can happen when you grip a squeeze-style water brush too firmly. It takes a session or two to get used to the button rhythm, but once you do, the control is excellent. The chisel tip version is particularly useful for calligraphy and bold mark-making that other water brushes cannot easily replicate.

Check Price on Amazonarrow_forward
Molotow Aqua Squeeze Pen
8/10
#5

Molotow Aqua Squeeze Pen

Tip MaterialSynthetic fiber (exchangeable)
Barrel TypeRefillable, soft-body squeeze
Tip Sizes1mm, 3mm (round); 7mm (chisel)
CapacityApprox. 5ml
Price Range$6–12
Made InGermany
Pros
  • checkExchangeable tips for customization
  • checkSoft-body barrel for intuitive squeezing
  • checkAvailable in unusual tip sizes
  • checkCan be filled with ink or liquid watercolor
Cons
  • closeTips are different from traditional brush feel
  • closeNarrower use case than a traditional water brush
  • closeTakes time to learn the barrel pressure

Our Take

The Molotow Aqua Squeeze is the most unconventional water brush on our list. Its soft-body squeeze barrel and exchangeable fiber tips make it feel more like a marker than a brush, which is either a plus or a minus depending on your style. Where the Molotow excels is versatility. You can swap tips for different line widths and fill the barrel with ink, liquid watercolor, or any water-based medium. For urban sketchers and mixed-media artists who want a portable tool for line and wash work, the Aqua Squeeze offers creative possibilities the other water brushes lack.

Check Price on Amazonarrow_forward

Water Brush Buying Guide

Everything you need to know about choosing and using water brushes.

water_drop

Understanding Water Flow Control

The key to using a water brush well is controlling the water flow. With squeeze-barrel types, grip the barrel gently — your normal writing grip provides slight pressure that keeps a small amount of water flowing to the tip. Squeeze harder for more water, release for less. It takes practice to develop an intuitive feel for the flow, but most painters adapt within a few sessions.

palette

Best Media for Water Brushes

Water brushes work best with pan watercolors, watercolor pencils, and water-soluble ink. Touch the wet tip to a watercolor pan to pick up pigment, or lay down watercolor pencil marks and go over them with the water brush to activate the pigment. They are less effective with tube watercolors directly, though you can pre-mix diluted tube color in the barrel for monochromatic wash work.

compare_arrows

Water Brush vs Traditional Brush

Water brushes trade control for convenience. A traditional watercolor brush gives you precise control over water loading, tip shape, and stroke dynamics. A water brush simplifies the process but limits your technique range. Think of water brushes as a complement to your traditional brush collection rather than a replacement. They excel in situations where portability and speed matter more than fine control.

Related Articles

luggage
Best Travel BrushesTraditional travel brushes
savings
Best Cheap BrushesBudget traditional brushes
school
Best Brushes for BeginnersStart painting with confidence
groups

BWB Editorial Team

Watercolor Brush Reviewers

The Best Watercolor Brushes editorial team has collectively tested over 200 watercolor brushes across 1,000+ painting sessions. Our reviews combine hands-on studio testing with feedback from professional watercolor artists, art educators, and passionate hobbyists. Every brush is evaluated using our standardized 5-criteria scoring system before it earns a recommendation.

  • Tested 200+ watercolor brushes hands-on
  • Standardized 5-criteria scoring system
  • Feedback from professional watercolor artists
  • Regular brush longevity re-testing
Our Testing Process|instagramyoutubepinterest

Water Brush FAQs

What is a water brush and how does it work?expand_more
A water brush is a refillable pen-like tool with a synthetic nylon tip and a hollow barrel that you fill with water. When you squeeze the barrel, water flows to the tip, allowing you to paint without a separate water container. You can pick up pigment from watercolor pans, pencils, or markers directly with the wet tip. They are designed for portability and convenience, especially for travel and sketchbook work.
Can I use water brushes for serious watercolor painting?expand_more
Water brushes are best suited for sketching, studies, and casual painting rather than finished studio work. They offer less control and a different feel compared to traditional brushes, particularly for techniques that require varying water load, precise tip control, or specific brush shapes. Most serious watercolorists use water brushes as a supplement for travel and quick work rather than as their primary painting tool.
What should I fill a water brush with?expand_more
Clean water is the most common fill for a water brush. However, you can also fill them with diluted ink (India ink or sumi ink mixed with water), liquid watercolor, or other water-based media. Avoid filling with thick paint or media that could clog the feed. If you fill with anything other than water, clean the barrel and tip thoroughly after each session to prevent buildup.
How do I clean a water brush?expand_more
Remove the barrel, rinse it thoroughly with clean water, and squeeze out any colored water until it runs clear. For the tip, hold it under running water and gently squeeze the barrel to flush color through. If pigment has stained the tip, soak it in clean water for a few hours. Replace the tip when it becomes permanently discolored or starts to lose its shape — most manufacturers sell replacement tips.
Which water brush tip size should I get first?expand_more
Start with a medium tip. It offers the best balance between detail capability and wash coverage, making it the most versatile single water brush. The medium Pentel Aquash or Kuretake is what most sketchers reach for most often. Add a fine tip for detail work and a broad tip for washes once you know you enjoy using water brushes.