Mod Podge Clear Acrylic Sealer Spray, 12 fl oz, Matte

I was looking for something to preserve some custom napkins my wife and I had printed for our wedding and eventually decided on this after checking out a few different options. It did exactly what I'd hoped! Added a nice protective layer on the napkin that feels as if it will work nicely to protect it for years to come. Plus it really does dry quickly, making it a breeze to apply multiple coats over a short time (which I'd recommend doing). The matte finish is great because it makes it almost impossible to tell that I've used any type of finish at all (no meaningful yellowing or other color change, no meaningful build up of acrylic gunk, etc.) Since buying, I've browsed around more online and realized you can probably get a similar product for less money from a lesser known brand name. But that might require some trial and error, and none of the cheaper options that have solid reviews are available at Walmart or other local brick and mortar retailers. This is versatile stuff too. I've since experimented with using it to preserve wood burned art where I also used color pencils to add subtle highlights and smooth out shading. I knew the colored pencil wouldn't stand up without good protections in the way the wood burn would, but I also didn't want to do a shiny coat of epoxy or equivalent. This did the trick exactly.