I want to use a wallpaper mural outside in my backyard. I would like to put the mural on a piece of primered and painted plywood. This way I can move it or remove it when I want. After the wallpaper mural is put on the painted plywood, I want to seal it for prodection. I just don’t want the sealer to turn yellow over time and ruin the mural. Can someone please help me?
Image taken on 2009-10-17 16:30:37 by avlxyz.
Marine polyurethanes yellow so don’t use these, they may also adversely affect the wallpaper, non yellowing polyurethanes are generally water based and are not suitable for exterior use, I think that if you are looking for longterm exterior protection then you are going to struggle to find anything that will not require a reasonable amount of maintenance as in re coating, the main problem you have is that although modern wallpapers have a certain amount of U.V resistance built into them they are not designed for exterior use and even with a U.V resistant exterior clear finish (which you should be able to get from any good paint supplier) the wallpaper is going to fade and discolor quite quickly.
I think you idea is interesting and creative but I don’t think it would last any length of time and you would just be disappointed in the inevitable results.
This sounds like a really creative idea. Lowes and such sell polyurethane that says ‘non-yellowing’ on the label.
Use some good marine grade polyurethane.