Testing SpectraFix FinalFix as a Protective Finish for Watercolor
We’ve been interested in testing SpectraFix FinalFix as a protective finish for watercolor paintings as an alternative to framing behind glass.
For this test, we used a variety of watercolor brands, including Daniel Smith, Holbein’s new granulating colors, and Michael Harding watercolors, painted on Arches 140 lb. cold press watercolor paper.
Following the manufacturer’s directions, we first applied a very light mist coat to set the color. After allowing it to dry completely for five minutes, we applied additional coats. Once the initial layer was set, we were able to spray heavier applications without disturbing the paint surface.
After the second coat, we noticed some beading on the surface, which initially looked concerning. However, within a few minutes the finish leveled out and absorbed evenly into the paper. It took approximately 4–6 coats before water beaded on the surface, indicating that the painting was fully sealed.
The finished surface was virtually invisible, with only a very subtle sheen that leans toward matte. Once sealed, the painting could be easily dusted or gently cleaned with a damp cloth. While the finish provides significant protection, it is not completely waterproof due to its milk casein content, so care should still be taken to avoid excessive moisture.
In our testing, we found no noticeable change in color when viewing the painting from either the front or side (Image 1). A difference between the sealed and unsealed areas becomes visible only when viewed at a very acute angle (Image 2).
Pros and Cons
Pros
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FinalFix was applied directly over watercolor without causing any bleeding or movement of the paint.
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Compared to other spray varnishes, it was exceptionally easy to use and required fewer coats to achieve a sealed surface.
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It does not contain the strong solvents commonly found in many spray varnishes. Instead, it is made from natural beeswax and milk casein suspended in alcohol.
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The finish leaves a nearly invisible protective layer with minimal impact on the appearance of the artwork.
Considerations
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FinalFix does not contain UV filters. We do not consider this a significant drawback when using lightfast pigments on high-quality archival paper such as Arches.
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While it offers substantial protection, it is not fully waterproof and should not be exposed to excessive moisture.
As always, please be sure to do your own testing with a product before you use it on a final piece as results can vary.
