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viscosity thickener

For IMpasto Effects 

This medium has been designed to be stirred into your paint colour to give a thick buttery consistency.

Originally it was formulated to give the perfect paint thickness for screen printing. However, it is now widely used to thicken colours to achieve an impasto effect in painting.

Add 2 teaspoons of thickener per 250ml of paint. Use sparingly as this a very effective medium (not compatible with fluorescent colours).


How to thicken your paint up to get a real textured impasto relief feel to the paint. 

You can use the sort of standard impasto mediums range. We make a couple of different products, a gel medium and an impasto medium. Very roughly, the difference is the gel medium will dry clear but not quite as much build as you will get with the impasto medium, which doesn't dry quite as clear. 


Why use Viscosity Thickener?


 When you thicken your paint with impasto or gel, you use equal parts impasto medium and the paint. With the viscosity thickener, you don't use anywhere near that; You just need to use a few drops to mix it in.  Now it does take a little bit of mixing, but this will chemically thicken the paint. Impasto and gel mediums are built to reduce the colour as little as possible, but, to get an actual texture, you've got to put quite a bit in, and anything that's not colour is going to reduce the colour.  


So by using the viscosity thickener, you get the same texture as the impasto medium. Still, you only need a couple of drops, and you get the impasto look but with no colour shift, which will thicken any water-based acrylic paint.

Once it dries and then the viscosity thickener dries quite matte, another thing to note with the viscosity thickener when you mix up the paint you want to use it all pretty well in one sitting. It might keep for a few days, but what will tend to happen if you add a little bit too much that is fine; however, it will tend to continue to swell if you're keeping it in a jar over a more extended period of time it will go quite thick and hard.  Paint that has been thickened with Viscosity Thickener should be used within 48 hours or so.


So if you've got any water-based acrylic paint that's a bit thin and you want to thicken it up, or you want to make it thick like an impasto modelling  Viscosity thickener is for you.

Available in 250ml size.



viscosity thickener in 250mL jar
Derivan Viscosity Thickener
AUD $ 28.75 AUD $ 28.75 28.75 AUD Add to Cart

AUD $ 31.63 AUD $ 31.63 inc GST

Online orders from Derivan FAQ

About Us 

We are a second-generation family business and have been proudly making paint here at the Derivan Factory for over 50 years – located in Rhodes, Sydney Australia. We are never out of stock as we make it on site.

Where do we ship to?

Online ordering is only available in Australia at the moment for international orders please contact us @ [email protected]


What payment methods do you accept for online orders?


We accept Visa and MasterCard on our website.

Our sales staff can also process other payment types manually, contact us and we can do  your order over the phone.  


How can I track my internet order 

Our staff will be more than happy to provide you with a tracking number, call us on 02 97362022 or email us with your order number and we will send you your tracking number.


When will my order be dispatched?

For all orders received before noon, your order is dispatched the same day and next day after 12 pm. It is the utmost importance to get your order to you as swiftly as possible.


Is your product Australian Made?

All our paint is made here on-site at the Derivan Factory our customers are often surprised to hear that we manufacture our paint in Australia. Yes, it is proudly Australian  ma de, and you can be confident your online order is factory fresh with quality raw materials.