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The Foundry

Paint Extender

Paint Extender

Regular price $10.99 USD
Regular price Sale price $10.99 USD
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Our Extender is great for those who want a longer open time with the paint, to help minimize the look of brush strokes and to extend drying time.

Painting in a dry climate or a space with low humidity? You may find your paint dries too fast. Buy yourself time with our uniquely formulated non-toxic extender – simply add it to the paint and you’ll have more time to brush back and forth to get the look you’re after!

The recommended ratio of 15 mL per pint (500 mL) of paint.

Using too much of this product will increase drying time substantially, but also increases cure time.  Add a maximum of 10% of the original paint volume.

Application Tool  Drop in to paint
Location  Interior/Exterior
Re-coat Time  2-12 hrs
Dry Time  2 hrs
Clean Up  Water
Coverage  Enough for 4 Pints of Fusion Mineral Paint
Recommended Uses  To increase the open working time of acrylic water-based paints and finishes like Tough Coat for no brush strokes



1 bottle is good for 2-4 pints. Adding more is not recommended as it will impact your drying and curing time. 

Recommended ratio of 15 mL per pint (500 mL) of paint.

Fusion Extender is a clear liquid and doesn’t change the colour of your paint.

Using Fusion Extender does increase the cure time and dry time of your paint.

Our Extender can be used with other water-based paint products.


Add no more than 10% extender into your paint. Once mixed with Fusion Mineral Paint, apply paint as usual. You will notice a longer open drying time, thus giving you time to work with the paint and smooth out brush strokes. 

Once your first coat fully dries, apply a subsequent coat as needed. We recommend waiting at least 4 hours between coats when using the Extender. Should you notice that applying your second coat is lifting off the first, either too much extender was used, or it needs more time to dry and cure before applying another coat.


  • Makes Fusion Mineral Paint™ and other water based paints flow more smoothly
  • Reduces brush and roller marks
  • Reduces wear on spray guns
  • Great for colour blending 
  • Non-toxic

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