Best Airbrush Thinners for Miniature Paints
Updated How we research
Vallejo - Airbrush Thinner for Acrylic Paints 200 ml (6.76 fl.oz.)
Vallejo Airbrush Thinner for acrylic paints in 200 ml (6.76 fl.oz.), a dedicated thinner for smooth airbrush spraying.
Vallejo - Airbrush Flow Improver for Acrylic Paints 60 ml (2.02 fl.oz.)
Vallejo Airbrush Flow Improver for acrylic paints in 60 ml (2.02 fl.oz.), an additive that slows drying at the nozzle.
Thinner is the least glamorous bottle on your bench and one of the most important. The right thinner turns a stubborn hobby acrylic into a smooth-spraying mix, slows tip dry so you are not wiping the needle every two minutes, and keeps pigment bound so your coats do not turn grainy. Water alone breaks down acrylic binder if you push it too far, which is why dedicated thinners include binder, flow improver, and drying retarder in balanced amounts. In this guide we compare thinners from the major paint brands along with flow improvers and retarder mediums, explain which combinations work across brands, and give you starting ratios for basecoats, glazes, and fine line work.
The short version
We compared 7 picks. Our scores range from 7.0 to 8.3 out of 10.
- Best overall:Vallejo - Airbrush Thinner for Acrylic Paints 200 ml (6.76 fl.oz.). Highest overall score in this guide at 8.3/10.
- Also great value:Tamiya TAM81040 Acrylic/Poly X-20A Thinner 250ml. Value score of 9/10, overall 7.7/10.
- Solid build:Vallejo - Airbrush Flow Improver for Acrylic Paints 60 ml (2.02 fl.oz.). Build and materials score of 8/10, overall 8.1/10.
- Feature-rich:Tamiya America, Inc Acrylic/Poly Thinner X-20A 46ml, TAM81030. Features score of 6/10, overall 7.5/10.
Scores are our editorial assessment, not customer ratings. How we score
- 1.Vallejo - Airbrush Thinner for Acrylic Paints 200 ml (6.76 fl.oz.)8.3/10See on AmazonCheck price
- 2.Vallejo - Airbrush Flow Improver for Acrylic Paints 60 ml (2.02 fl.oz.)8.1/10See on AmazonCheck price
- 3.Tamiya TAM81040 Acrylic/Poly X-20A Thinner 250ml7.7/10See on AmazonCheck price
- 4.Tamiya America, Inc Acrylic/Poly Thinner X-20A 46ml, TAM810307.5/10See on AmazonCheck price
- 5.Createx Airbrush Paint, 4011 Reducer, 8 Oz (4011-08)7.0/10See on AmazonCheck price
- 6.Createx Colors 4012 High Performance Reducer 16oz. Size7.0/10See on AmazonCheck price
- 7.Createx Colors 4012 High Performance Reducer 8oz. Size7.0/10See on AmazonCheck price
#1Vallejo Airbrush Thinner for acrylic paints in 200 ml (6.76 fl.oz.), a dedicated thinner for smooth airbrush spraying.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 9/10
- + Designed to thin Vallejo and similar acrylics without breaking binder
- + 200 ml bottle lasts a long time for regular airbrush use
- + Reduces tip dry and splatter compared with thinning with water
- - Overthinning still causes runs, so ratios need testing
- - Best matched to Vallejo paints, results vary on other brands
#2Vallejo Airbrush Flow Improver for acrylic paints in 60 ml (2.02 fl.oz.), an additive that slows drying at the nozzle.
Fit for the job 9/10 · Features and specs 7/10 · Build and materials 8/10 · Value 8/10
- + Slows paint drying so the airbrush tip clogs less often
- + Improves flow for smoother gradients and fine lines
- + Small doses mean a 60 ml bottle goes a long way
- - Too much flow improver can leave a tacky or slow-drying finish
- - An additive, not a thinner, so you may still need both
#3Tamiya TAM81040 Acrylic/Poly X-20A Thinner in a 250ml bottle, the bulk size of Tamiya's standard acrylic thinner.
Fit for the job 8/10 · Features and specs 6/10 · Build and materials 8/10 · Value 9/10
- + 250ml bottle is far better value than repeated small bottles
- + Matches Tamiya acrylic chemistry for smooth, fast-drying airbrush coats
- + Also useful for cleaning Tamiya paint out of airbrush parts
- - Alcohol content gives off fumes that need airflow in the room
- - Less suited to thinning water-based hobby ranges like Vallejo
#4Tamiya Acrylic/Poly Thinner X-20A in 46ml (TAM81030), the matching thinner for Tamiya acrylic model paints.
Fit for the job 8/10 · Features and specs 6/10 · Build and materials 8/10 · Value 8/10
- + Formulated specifically for Tamiya acrylics and airbrushing them
- + Alcohol-based thinner helps Tamiya paint dry quickly and evenly
- + Widely available and trusted across the scale model community
- - Not a good match for Vallejo or Army Painter water-based paints
- - Stronger odor than water-based thinners, so ventilate the room
#5Createx 4011 airbrush paint reducer in 8 Oz (4011-08), a reducer made to thin Createx colors for better spraying.
Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10
- + Designed to match Createx paint chemistry for reliable thinning
- + 8 Oz bottle is a sensible size for regular hobby spraying
- + Helps reduce clogging when working with fine nozzles
- - Tuned for Createx rather than typical miniature paint brands
- - Thinning ratios need testing to avoid watery coverage
#6Createx Colors 4012 High Performance Reducer in a 16oz size, a stronger reducer for fine detail airbrush work.
Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10
- + High performance formula aids atomization for crisp detail lines
- + 16oz size is economical for frequent airbrush users
- + Also helps flush and clean dried paint from airbrush parts
- - Stronger formula calls for good ventilation while spraying
- - Large bottle is more than most mini painters will use
#7Createx Colors 4012 High Performance Reducer in an 8oz size, a smaller bottle of the brand's detail-focused reducer.
Fit for the job 7/10 · Features and specs 6/10 · Build and materials 7/10 · Value 8/10
- + 8oz size lets you try the high performance reducer cheaply
- + Improves flow of Createx and similar water-based paints
- + Suits fine airbrush lines and freehand detail work
- - Designed around Createx paints, not hobby-specific acrylic ranges
- - Proper dilution ratios take some trial and error
Before you buy: trade-offs we flagged
No pick is perfect. These are the main compromises we noted for the top products in this guide, so you can check they will not matter for you.
- Overthinning still causes runs, so ratios need testing (Vallejo - Airbrush Thinner for Acrylic Paints...)
- Too much flow improver can leave a tacky or slow-drying finish (Vallejo - Airbrush Flow Improver for Acrylic...)
- Alcohol content gives off fumes that need airflow in the room (Tamiya TAM81040 Acrylic/Poly X-20A Thinner 250ml)
- Not a good match for Vallejo or Army Painter water-based paints (Tamiya America, Inc Acrylic/Poly Thinner...)
- Tuned for Createx rather than typical miniature paint brands (Createx Airbrush Paint, 4011 Reducer, 8 Oz...)
- Stronger formula calls for good ventilation while spraying (Createx Colors 4012 High Performance Reducer...)
Frequently asked questions
›What is the best choice among airbrush thinners for miniature paints?
Vallejo - Airbrush Thinner for Acrylic Paints 200 ml (6.76 fl.oz.) is our top overall pick. Vallejo Airbrush Thinner for acrylic paints in 200 ml (6.76 fl.oz.), a dedicated thinner for smooth airbrush spraying. It earns our score of 8.3/10, based on fit for the job, features, build and value.
›What is a good budget option?
Vallejo - Airbrush Flow Improver for Acrylic Paints 60 ml (2.02 fl.oz.) is the strongest low-cost pick in this guide. Vallejo Airbrush Flow Improver for acrylic paints in 60 ml (2.02 fl.oz.), an additive that slows drying at the nozzle.
›How much should I expect to spend?
Picks in this guide span See on Amazon price bands (roughly: $ = under $30, $$ = $30 to $100, $$$ = over $100). We never display exact prices because they change constantly, so the buttons above always show Amazon's current price.
›How were these products chosen?
We shortlist products that fit the job this guide solves and compare their published specifications, such as size, capacity, materials and what is included. Each pick gets an editorial score out of 10 for fit, features, build and value, and we write the pros and cons from those details. Our score is not an Amazon customer rating. We earn a commission if you buy through our links, which never affects the ranking.
Mini Paint Lab independently selects every product; we may earn a commission from links above.
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