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Humbrol Acrylic Thinners Review: Better flow and slower drying for acrylic paint

Humbrol 125 ml Acrylic Thinners
4.6
[Smoother Application]  Improves paint flow and finish for effortless brushwork and professional results.
[Drying Retardant Additive]  Includes retardant to slow drying, allowing longer working time and better blending.
[Brush Cleaning Function]  Also cleans brushes after acrylic painting, simplifying cleanup and preserving brush life.
[Portable 125ml Bottle]  Compact 125ml size ideal for studio, hobby use, easy to store and transport.
[Humbrol-Compatible Formula]  Specifically formulated for use with Humbrol Acrylic paints for optimal consistency and results.
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Designed for hobby painters, Humbrol Acrylic Thinners improves acrylic flow and reduces drying speed for finer brush control. Longer working time takes the rush out of delicate detailing and layering. Is the small, sealable bottle and brush-cleaning ability enough for model-makers who prefer tidy kits?

⚡ At a Glance
  • Thinning Performance: Effectively thins Humbrol acrylic for smoother flow and finer brushwork
  • Best for: Model-makers, miniature painters and hobbyists needing controlled drying and detail work
  • Not ideal for: Large-scale industrial cleaning or non-acrylic paint systems

Formulated to enhance the usability of Humbrol Acrylic with a retardant to reduce drying rate. Also suitable for cleaning brushes after acrylic paint use.


Finer brush control – with effective thinning formulation

A formulation designed to thin Humbrol acrylic to a more fluid consistency, improving brush flow while maintaining workable viscosity. Thinning reduces surface tension so fine brushes lay paint more evenly.

Thinned paint enables smoother, more precise strokes for detailing and delicate highlights.

Longer working time – thanks to an included retardant

The thinner contains a retardant component specifically to slow the drying rate of acrylics, extending the paint's open time on the palette and model surface. Slower evaporation keeps edges workable for longer.

Extended blending and layering windows help when glazing or matching subtle colour transitions.

Cleaner brushes between sessions – with multi-use cleaning capability

Suitable for use as a brush cleaner after acrylic painting, able to dissolve and remove uncured acrylic residues from bristles. The 125ml format and sealable cap reduce contamination.

Brushing out paint residues is simpler, which helps maintain brush condition and keeps colours purer.

✨ The 4 Key Reasons for Humbrol Acrylic Thinners
  1. Included retardant – Extends working time for blending and layering by slowing drying
  2. Brush-cleaning use – Cleans acrylic residue from brushes after painting sessions
  3. 125ml sealable bottle – Keeps contents secure and fits neatly in hobby kits
  4. Formulated for Humbrol acrylic – Improves paint flow for fine detail and smoother coverage
📋 Technical Details at a Glance
  • Category: Hobby accessory, paint thinner
  • Brand: Humbrol
  • Capacity: 125ml bottle
  • Purpose: Thinning Humbrol acrylic paints
  • Contains: Retardant to reduce drying rate
❓ Frequently Asked Questions

Q: Can this thinner slow the drying time of acrylic paint?

A: Yes, the thinner includes a retardant specifically formulated to reduce the drying rate and extend working time.

Q: Can the thinner be used to clean brushes?

A: Yes, the thinner can be used to clean brushes after using acrylic paint, helping remove paint residues from bristles.

Q: What size is the bottle and is it easy to store?

A: The product comes in a 125ml bottle and user feedback notes the cap seals well, making it convenient for hobby storage.

🏆 Our Verdict

Ideal for hobbyists and miniature painters who need precise thinning and controlled drying while working on small-scale projects. The inclusion of a retardant and brush-cleaning capability adds practical versatility during detailed work. While budgets vary, the 125ml size and dual-purpose use make a practical, long-lasting addition to a hobby kit.