Acrylic question

[IPT]

So I have some really old Weld on 4. Does that stuff go bad? I tried it on a thin little test piece and it seemed to bond.

I know acrylic does not bond very well to glass with silicone but for an overflow it should work fine (I'm not building a tank or even a sump. Just a box that will be in 5 inches or less of water and generally have nearly equal pressure from both sides most of the time). I'll butt the front wall up to the bottom piece and maybe even give it two sides so any pressure it does have on it will not be loaded to the silicone (if I only used a 3 sided box and expected the silicone to hold the horizontal front to the perpendicular side wall). It's 1/4 inch.

Surely some of you guys have done this without issue? The weld on will keep it together, I just need to silicone to hold it in place and seal it off.

[IPT]

please close - wrong forum - started a new one in DIY.