Plexiglass glue

[ickmagnet]

I had an "accident" after setting up my new protein skimmer that caused a bit of an explosion! Luckily, nothing cracked but the adhesive seal holding a plexiglass panel in place broke (too much water pressure). I since realized where I erred and am ready to give it another shot. The only thing I have to do first is re-glue the plexiglass panel. A product called weld-on 16 was recommended but I can't find it anywhere at any hardware store. I went to Home Depot and there were several different types of glues but I wasn't sure which one to use as an alternative. Any ideas anyone? Also, is this something that should be done by a professional and if so, can anyone recommend someone?