My absolute favorite collage material is Collage Pauge Instant Decoupage from Aleene's. I picked this up one day at Artco, which is my favorite local (5 miles or less) craft store.
I bought this one day when Artco was doing free demonstrations. They had a magnet making workshop, and the employee let my 6 year old sit there and glue paper to glass with this stuff for what seemed like an hour. When we left, she begged me to buy stuff to buy more, and of course I had to buy the glue that the lady used because my daughter is literal, and if the lady used it, then this must be the only kind that would work.
I bought a 16 oz bottle, which was over a year ago and still have plenty left, after making magnets, canvases, altered items, plaques, and more. I have been very impressed at how long this stuff lasts.
I purchased the glossy version, there are versions in matte, and the website says there is a sparkly option as well. This dries clear, and does not have that sticky feeling that some products have even when dry. The texture is thick, and it has a greenish purplish cast when it is wet, but that goes away after drying. I've managed to get this stuff to stick to paper, wood, canvas, plastic, glass, and cardboard. Once dry, this is pretty durable stuff. I can't get this off my kitchen table, which is also the craft table, and kids table, so the whole thing is pretty much a mess with stickers, collage pauge, acrylic paint, markers and whatever else. Thank goodness for tablecloths!
I have not had problems with this bubbling, and it seems to level itself as it dries, so paper I adhere has warped wet, and then dried flat.
I had to google the lady on the front to see who she is, because I had no idea. Traci Bautista is a mixed media artist with a bright and eclectic style. According to the Aleene's site, Traci designed the art on the bottle.
The only caution I can give for Collage Pauge is to test any ink you are using on scrap paper before you use the medium on it, as many inks such as pens and markers are picked up by this product despite being permanent or waterproof. If you test first, you know how it will react, and what to expect in your finished product.
My overall rating: 5/5