What to Use to attach Plexi to Plastic????

[ensquire]

In the middle of remodeling my sump right now also, but it is glass on glass and I didn't think it would work with glass and plastic.
Should have asked question here first LOL. Would have saved the " Why do you always have to modify things " Question from my wife...............

Originally Posted by GMGQ

Silicone actually dries pretty sturdy. Just squeeze a good bead along the bottom, and press it down, and squeeze some more around to fill in the edges, and let it cure overnight.

I used it to put lucite baffles in my sump, holds rock hard. It was actually a PITA to remove when I wanted to change the layout of my sump!