Fixing a leak in acrylic?

[Kehy]

I'm modifying a cunzo mini complete tank, and was compelled to add a big ole window in the sump. Unfortunately the bottom seam of the window is leaky as all get out. Can this be fixed?
The window itself is made of acrylic, and the sump is ABS, if it make a difference.
Leak test:

 

[fishguy242]

hi,what did you use as glue??

 

[Kehy]

Supposedly Weld-on 16. Or at least this is what Amazon sent me when I ordered that.

 

[fishguy242]

that is exactly what i was going to suggest poss try black abs pvc glue,it is the black that is not absorbing the weld,same w reg pvc glue does not work w black pipe,give me a min see if i can get you a pic

 

[MastaMind82]

Did a little bit of reading and you might want to try this adhesive. On face value it seems to be one that can bond with ABS. In my professional experience as car wrap installer ABS is a true PITA to work with for adhesion.

 

[fishguy242]

 

[Reverend Turtle]

Looks like it didn't have enough force to join the together. If you can get them apart, try again, with lots of clamps all the way around. If not try an put a thick bead all the way around the window.

 

[vetteguy53081]

This or weldon works really well !!