Easily covers both sides of a 550 piece 18" x 24" puzzle leaving a little extra. I recommend using either a flashlight or a brightly lit room so you can see which parts are well covered. I only poured in the middle of the puzzle but it would probably be better to use smaller puddles all over the puzzle or pour it in a spiral pattern as some of my edge pieces got a bit lost after just gluing the front piece together. It was definitely easier to attach to the back of the puzzle as you could easily tell where there was less glue depending on the color of the backing paper. This made the front of the puzzle a little shinier, but it looked fine on my puzzle. Based on the complaints, here are some of my thoughts: Use wax paper under your puzzle because it will ooze through cracks. I only had one spot where a decent piece broke through, but it came off the wax paper easily, and I used the cheapest wax paper I found on Amazon. DO NOT use newspaper or poster board. I ran out of air bubbles, I didn't apply glue for a day or two after receiving it, which may have helped get rid of the air bubbles during shipping. enough to get it in every crack, but you have to pour it pretty thick. I pushed all the excess to the sides. It actually wasn't that messy if you used wax paper underneath with a 2-3 inch margin around the puzzle. Any glue that got on my hands dried very quickly and was removed within a minute of cleaning. When I finished applying, I was just able to pull off a piece of the puzzle. I picked up my jigsaw puzzle after 8 hours of drying and just the front side and it held up very well. There were a few loose spots, but the app on the back should fix that. Don't fiddle with the puzzle until it has dried for several hours. Just apply glue and get started. I would definitely recommend buying 2 bottles for a 1000 piece puzzle if this is your first time doing something like this. This was my first time and I had some areas I wasn't covering that well and areas. where I moved the excess on the sides. You'll likely lose something, overuse, or need to recoat. It seemed like you had to be very efficient on both sides of a 1000 piece puzzle using only 1 bottle. I only filled in the middle. They seemed to smooth out when you closed the puzzle and left some weight on it for a couple of hours, like books. They weren't ruffled to the point where I wouldn't frame them. My back attachment is currently drying out, if this causes other damage or problems I will update this review.
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