How do I seal this?

Amy
by Amy

I have a sign I painted for the front porch at synagogue. The base is canvas. I used exterior paints. Now, I need to seal it to protect it from sun (as sun goes down) and all. What kind of seal do I use it. Don’t want the dove to become yellow.

The Shalom sign

  9 answers
  • Megan Megan on Mar 14, 2019

    That is beautiful! I have used Miniwax poly over exterior paints before and it's worked well without yellowing. BUT I would paint a piece of scrap wood with that same white and seal it with the Minixwax poly, that's a good way to test it out and make sure it won't turn yellow on you!

  • Zard Pocleeb Zard Pocleeb on Mar 14, 2019

    Buy some polyurethane or lacquer in a spray can. Give it 3 or 4 coats.

  • William William on Mar 15, 2019

    Go for the fast drying polyurethane. Make sure it's water based. Will not yellow.

    • Dennis Gunter Dennis Gunter on Mar 15, 2019

      Will yellow but less noticeable

      Sun uv Ray's will yellow almost anything.Spar is better for outside

      used on boats

  • Lizbeth Lizbeth on Mar 15, 2019

    Agree water-based poly doesn't yellow. Avoid oil-based as it does yellow. I've never used any poly on canvas though, only on wood, metal, and paper mache. It should be fine but maybe do a test on spare canvas.

  • Amy Amy on Mar 15, 2019

    Thank you all.

    Shalom.

  • Dennis Gunter Dennis Gunter on Mar 15, 2019

    water based spar polyurethane from Lowes

    made by Minwax

    • William William on Mar 15, 2019

      Just as I said. Water based polyurethane. Doesn't yellow.


      Spar urethane and varnish gets its name from the wooden poles that support the sails on a marine vessel. A ship's spars get exposed to an unusual amount of wind, sun and moisture, so spar urethane/varnish has to be more durable than regular urethane/varnish to last for any length of time. To this end, a traditional spar urethane/varnish contains a high ratio of resins to solvents. That not only gives it more body and makes the final finish harder, it also provides crucial protection from ultraviolet sunlight.

  • Shoshana Shoshana on Mar 17, 2019

    It's so beautiful, Amy!

  • Amy Amy on Mar 17, 2019

    Thank y’all, again!

  • Dee Dee on Mar 17, 2019


    what a beautiful plaque! Use spray lacquer or water based poly. Do NOT use oil based poly as it WILL YELLOW.