My Music My Art

Wednesday, December 12, 2018

Yes, yes U can

So the question is; can I use a polyurethane to seal my paintings? I contacted Rust-o-leum and they recommended using their Ultimate Water-based Polyurethane to seal my acrylic paintings. I was a bit skeptical at first but decided to give it a try anyway on a throw away painting so I went to my local home-improvement store and bought an 8 oz matte finish can of the Ultimate water-based Polyurethane. Make sure that it is the the Ultimate Polyurethane water based as below because there are many different Poly's which will damage your painting.

gloss can of Ultimate Polyurethane


It also comes in Gloss, semi gloss and Satin. There is an 11.5 oz. spray as well. I prefer not to use sprays because the spray gets into the air and spreads everywhere not only that but I end up breathing it in. I'm already battling cancer and don't need to add to it. The can stuff is milky white as I opened it and rather than shaking it, stirred was preferred. Read the label. I noticed only a light odor. Even though the color in the can is white, it brushes on clear. It won't yellow nor darken your painting in time.

I applied it to my painting that was on art paper with a brush and, wow!,the results were the same as if I used  known water based sealers acquired from art stores. I only put on two coats rather than 3 as recommended for use on wood. I figured that it would suffice for my purposes and made sure that it covered all of my painting well. I would normally have used this on my hard board panels but for my experiment I used special paper for art, I like the 11"x14" but below is a 9"X12".

pic of 9"x12" art paper


It did not change the color of my painting nor did it leave a film on it making my painting dull. It made the colors stand out rather than blending in as acrylics often do when using similar colors. The sealer actually brought out the colors and I could see them as individual colors.

The sealer dried within 5 minutes rather than the 2 hours stated on the can but waited the 2 hours anyway to put a second coat. I was impressed by the lack of strong lingering odor other sealers have. The little odor is tolerable and disappears within a couple of hours.

I'm very impressed by the Verithane Water Based Ultra Polyurethane as it did exactly what I was hoping for and recommended to me by Rust-o-leum. The stuff is however toxic before it dries so you don't want to inhale the fumes. I didn't have a problem with it as it was at my waste level all the time and the fumes stayed low to the can. Clean up was easy, just a rinse with water did the trick. I should point out that I used the sealer indoors and the furnace was just behind the door eight feet away.

I ended up sealing about 10 painting with the same results. I am impressed! I should point out that there is an oil based Ultra Poly as well which I will check out at another time. Try the water based poly on one of your throw away painting and see if you agree. The cost of it for an 8 oz can was under $5 at Menards. I would have never thought that I would be using a polyurethane as a sealer for my paintings. It's a keeper!

Here's a few paintings I did on paper using Ultimate Poly:

a painting with a Polyurethane sealer

a painting with a Polyurethane sealer