---
product_id: 9801699
title: "Professional Acrylic Medium, Flow Improver, 250ml (8.5-oz)"
brand: "winsor & newton"
price: "€ 35.34"
currency: EUR
in_stock: true
reviews_count: 8
category: "Winsor & Newton"
url: https://www.desertcart.es/products/9801699-professional-acrylic-medium-flow-improver-250ml-8-5-oz
store_origin: ES
region: Spain
---

# Slightly slows drying for precision control No color shift from wet to dry Enhances acrylic flow for flawless coverage Professional Acrylic Medium, Flow Improver, 250ml (8.5-oz)

**Brand:** winsor & newton
**Price:** € 35.34
**Availability:** ✅ In Stock

## Summary

> 🎨 Flow like a pro — paint with precision and vibrant control!

## Quick Answers

- **What is this?** Professional Acrylic Medium, Flow Improver, 250ml (8.5-oz) by winsor & newton
- **How much does it cost?** € 35.34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.es](https://www.desertcart.es/products/9801699-professional-acrylic-medium-flow-improver-250ml-8-5-oz)

## Best For

- winsor & newton enthusiasts

## Why This Product

- Trusted winsor & newton brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **True-to-Color Finish:** Maintain vibrant, consistent hues from wet brush to dry canvas.
- • **Controlled Drying Time:** Gain extra working time with a medium that subtly slows drying without delay.
- • **Effortless Flat Coverage:** Achieve smooth, even color application without losing pigment strength.
- • **Precision Hard Edge Painting:** Perfect your sharp lines and defined shapes with enhanced flow.
- • **Trusted Professional Quality:** Join thousands of artists who rely on Winsor & Newton’s flow improver for flawless results.

## Overview

Winsor & Newton Professional Acrylic Medium Flow Improver (250ml) is a premium additive designed to enhance the flow of acrylic paints, enabling smooth, flat, and even color application without altering pigment strength. It supports hard edge painting techniques by maintaining color stability and slightly extending drying time, ensuring no color shift from wet to dry. Ideal for professional artists seeking precision and consistency in their acrylic work.

## Description

Winsor & Newton Professional Acrylic Medium Flow Improver maintains no color shift from wet to dry when used with Professional Acrylic. Increases the flow of color allowing the application of areas of flat, even color without changing color strength. Also maintains the stability of color and slightly slows drying. Effective for hard edge painting techniques.

Review: No troubles here - Used this to make airbrush thinner. Works great, have yet to use it for painting but I'm excited to give it a go. Definitely buying again.
Review: Great old reliable product - As described

## Features

- Medium increases the flow of acrylic colors, allowing the application of areas of flat, even color without changing color strength
- Effective for hard edge painting techniques
- Maintains the stability of the color and slightly slows drying
- Maintains no color shift from wet to dry when used with Winsor & newton professional acrylic

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0060KRND6 |
| Age Range Description | Adult |
| Best Sellers Rank | #10,755 in Arts, Crafts & Sewing ( See Top 100 in Arts, Crafts & Sewing ) #268 in Art Paints |
| Brand Name | Winsor & Newton |
| Color | Flow Improver |
| Color Code | transparent |
| Container Type | Bottle |
| Coverage | Good |
| Customer Reviews | 4.6 out of 5 stars 7,778 Reviews |
| Dry Time In Hours | 24 |
| Finish Type | Satin |
| Full Cure Time | 1 Hours |
| Global Trade Identification Number | 00884955001851 |
| Included Components | 1 x WN Acrylic Flow Improver 250 ml, ACFAFI250 |
| Indoor Outdoor Usage | Outdoor |
| Is Waterproof | False |
| Item Form | Liquid |
| Item Height | 2.32 inches |
| Item Type Name | Winsor & Newton Professional Acrylic Medium Flow Improver, 250ml (Packaging may vary) |
| Item Volume | 250 Milliliters |
| Item Weight | 0.15 Kilograms |
| Manufacturer | ColArt Americas |
| Model Name | Winsor & Newton Professional Acrylic Medium Flow Improver, 250ml (Packaging may vary) |
| Paint Type | Acrylic |
| Size | 8.4 Fl Oz (Pack of 1) |
| Special Features | Fast-Drying |
| Specific Uses For Product | canvas |
| Surface Recommendation | Edge |
| UPC | 884955001851 |
| Unit Count | 8.4 Fluid Ounces |
| Water Resistance Level | Water Resistant |

## Product Details

- **Brand:** Winsor & Newton
- **Color:** Flow Improver
- **Finish Type:** Satin
- **Size:** 8.4 Fl Oz (Pack of 1)
- **Item Volume:** 250 Milliliters
- **Special Feature:** Fast-Drying
- **Unit Count:** 8.4 Fluid Ounces
- **Paint Type:** Acrylic
- **Specific Uses For Product:** canvas
- **Surface Recommendation:** Edge

## Images

![Professional Acrylic Medium, Flow Improver, 250ml (8.5-oz) - Image 1](https://m.media-amazon.com/images/I/712cPDtnniL.jpg)

## Available Options

This product comes in different **Color, Style** options.

## Questions & Answers

**Q: Has anyone tried this as a photo transfer to wood?  Using regular acrylic medium now, but don't like the white base.**
A: This  might work because it is clear and flexible when dry. I have used it on wood before and it is perfect.

**Q: Safe to use as a sealant for acrylic paint repainted barbie/doll faces? (vinyl&plastics)? water-based/mixable? does it dry sticky? any fumes?**
A: I've used the Winsor & Newton Matte Acrylic Varnish as a top coat and protective finish whenever a colored acrylic is used as a base.  I've used W&N varnish over acrylic primers and paint on hard plastics, wood, and metal surfaces.  The underlying acrylics from any company can be used as a base as long as they are labeled as  such.

In answer to your specific questions - I've never painted on vinyl or soft plastics like doll faces but if your acrylic base coat and color adheres well to such surfaces then the W&N varnish will also adhere.  The varnish is only a top layer that locks onto the underlying coat of paint to prevent smudges and to keep the surface clean.  And of course the UV with this varnish is supposed to protect against sunlight discoloration - but be aware no UV coating will last forever.

Acrylics by definition are water based.  Although I might thin color acrylics with water I would not thin any varnish with water because it would affect its chemical makeup and thus its functionality.  W&N does sell an acrylic based thinner though that I always use when airbrushing since the varnish is a little thick for that purpose.  I imagine that this thinner will also work when hand brushing if that is what you're doing.

The varnish dries hard and there is a mild smell to the liquid varnish but not an unpleasant one.  That smell disappears once the varnish has dried.

**Q: If I mix this medium with a powder pigment, then i will have my own acrylic paint?**
A: This stuff is very thick, not paint texture. Instead try a gloss or matte acrylic medium for adding pigments to for a more paint like texture.

**Q: Can I use this to fill spaces/cracks between planks on a wooden boat model? I will need to be able to sand and then paint with acrylic paint**
A: I would think so. I have not used it for that. It is a good product, and if you called customer service they could probably answer any questions.

## Customer Reviews

### ⭐⭐⭐⭐⭐ No troubles here
*by F***D on December 13, 2025*

Used this to make airbrush thinner. Works great, have yet to use it for painting but I'm excited to give it a go. Definitely buying again.

### ⭐⭐⭐⭐⭐ Great old reliable product
*by E***N on March 25, 2025*

As described

### ⭐⭐⭐⭐⭐ In Response To the Question On Whether It Is "Really Matte" Along With Other Useful Information
*by C***S on August 31, 2021*

I am not professional but have considerable experience with W&N matte varnish at least when airbrushing. In August 2021 I completed preparation of a middle earth poster (also purchased from Amazon) that came with a very glossy finish. After mounting but before framing I airbrushed the poster's surface with W&N matte varnish. The varnish removed the gloss making the map look more realistic. I took a photo with my cell phone (without flash) to show the effect. The left side of the map is how the entire poster actually looks to the eye. The right side of the map is a natural light bloom in the room . The important thing to note is how this skimming light is effectively scattered as it should be with a matte finish. I use this W&N varnish whenever I want a truly matte finish as was also done on this large model airplane. The photo was taken in bright sun and the matte varnish provided the desired dull military like finish while also eliminating any bright reflections. Again I only have airbrush experience with this varnish. When using it in this way a flow improver (also W&N) is - I believe - necessary. The varnish's viscosity and fast drying capability will clog up the airbrush without the flow improver. Also the varnish needs to be properly atomized for application and the flow improver does the job here as well. I add the improver to the airbrush cup in a mix with the varnish. The amount is best learned through experience. I set the airbrush pressure at about 30-35 psi. When airbrushing a little varnish goes a long long way. One additional note is that I have found the varnish to dry "clear" - that is not yellowing or changing the color of the underlying acrylic. (My experience seems to conflict with some other observations.)

## Frequently Bought Together

- Winsor & Newton Professional Acrylic Medium, Flow Improver, 250ml (8.5-oz)
- Winsor & Newton Galeria Acrylic Color, 60ml (2-oz) Tube, Cadmium Orange Hue
- Liquitex BASICS Acrylic Paint, 118ml (4-oz) Tube, Brilliant Purple

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*Product available on Desertcart Spain*
*Store origin: ES*
*Last updated: 2026-02-25*