Smooth Paint Finish Additive Extender • Fusion™ Mineral Paint


Are you 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 extender – simply add it to the paint to and you’ll have more time to brush back and forth to get the look you’re after

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.

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 maximum 10% of original paint volume.

  • 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

Application Tool  Drop into paint
Location  Interior/Exterior
Re-coat Time  6-12 hrs
Dry Time  2 hrs
Top Coat  Not required – however any top coat can be applied if   desired.
Clean Up  Water
Coverage  Enough for 4 Pints of Fusion Mineral Paint
Finish/Sheen No effect
Recommended Uses  To increase the open working time of acrylic water based paints and finishes
Can Be Applied To  To be used with Fusion Mineral Paint or Tough Coat
Can Be Painted Over  Yes
How to Prep  Apply to a clean, wax or oil free surface
Cure Time  28 Days
Maintenance/ Cleaning  Clean as required,   mild soap and water.



What do I use Fusion Extender for?

Fusion Extender is used to “extend” the open time of Fusion Mineral Paint – meaning it takes longer to dry. People use it mainly to help avoid brush strokes and to help make blending really easy.

How do I use Fusion Extender?

If you’re doing a large piece, mix 1/4 bottle of Extender into a pint of paint and mix well. We recommend using only about 1 part Extender to 10 parts paint (10 mL of Extender to 100 mL of paint).

I want to use more than the recommended ratio, what will happen?

The more Extender you use, the longer it will take to dry. If you use too much, you could end up with a drying time of more than a day! It will also increase your cure time, which means the paint will take longer to get to its most durable state.

Why does using the Extender make the curing time longer?

The Extender has propylene glycol in it, which draws water toward it. Because it likes to hold onto the water, it takes a long time for the water to evaporate from the paint and cure. The more Extender you add, the more water it holds, and the longer it takes to cure.



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.


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.


  • Makes Fusion Mineral Paint and other water based paints flow more smoothly
  • Reduces brush and roller marks
  • Reduces wear on spray guns
  • This eco friendly version does not add additional VOC’s!
  • Cure time may increase depending on how much Extender is added.



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


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


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

Add it to your Tough Coat for a longer open time and a smoother finish.

Metallics can dry fast adding extender helps with a brushstroke free finish.




From Our Tutorials:

From Our Blog:

  • How to get a Smooth Paint Finish without Brushstrokes

    Fusion Extender Tutorial


    Have you been struggling to get a super smooth paint finish? Struggle no more! We are thrilled to introduce our newest F
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Add no more than 10% extender into your paint for a flawless finish.


Just add a quarter bottle or half a bottle, to 1 Pint of Fusion Mineral Paint for a super smooth brush stroke free finish!