I bought this item not knowing how it would really work, though I really bought it to build a filtration water tank. I tried it with two pieces of plexiglass from a recent project. It glued the two pieces very well, very strong as I have tried to break the bond by hand. It still held. I then left in water for about two days. The joint was unharmed and still perfect. I am confident it will make a great water tank. I will update when I am done.