I’ve noticed that some of the laminations tend to separate after they have been used a few times and was wondering what I could do to prevent this. My wife uses a product called Mod Podge in her crafting so I thought I would try it. It comes in matt and gloss finish. I first tried the matt one, it makes the cardboard much more ‘solid’ but I think the gloss finish looks better. It takes several days to fully harden. The bottle says 20 minutes or so to dry but even a day later it still felt slightly tacky. However after a couple of days it was fine. The fit of the pieces is a little tighter but I havent had a problem fitting them together.