4 inch acrylic tubing

[sleeman]

Steve,
You are right, sort of. Weldon 3 and 4 will work as will weldon 16 with extruded. The problem is you may get some crazing with anyof these products. Weldon 5 should not craze or at least craze as much.
From IPS page :
5 - Water thin, slow-setting solvent cement for bonding acrylics. Also bonds styrene, butyrate, PETG and polycarbonate to themselves. Will not bond to cross linked acrylics.
Since annealing is not an option for the average person, a slower setting cement should help. Weldon 5 is more expensive, but you also get a lot more.
As for the weldon 40, you will find that you get a much better joint when gluing PVC to Acrylic. IME, Weldon 16 will work when glueing PVC to acrylic. It has a tendancy to shrink, and seems almost too hard compared to the Weldon 40
Anyways, that was not my point.
After all the running around to 2 or 3 different stores, inhaling a bunch of nasty chemicals and then possibly having to do something over again because you screwed up a joint.
It may be more time and cost effective to just buy one.
I am not trying to stop anyone from DIY projects, that is what makes this hobby so much fun for me, and I believe many others as well.
I just hate to see someone spend a bunch of money only to realize they could have done it cheaper and easier.

Cheers,

Al