I really like the Ranger Matte Medium, but I looked on the container and it doesn't say anything about ingredients...I would suggest you call Ranger directly and ask if it is flammable. I suspect it isn't. Usually flammable glues are vaporous with an acetone smell, this is not. I feel it is a lot like a white glue but the consistency is gel-like and it is really transparent when dry with a satiny finish, not glossy. When applied with a brush you could get brush strokes if that is a finish that you desire. I use it often on paper items I cut to firm them a bit . It's a great product!