OK, so I have been using Weld-On 4 to fix cracks in Vistalites... It's supposed to zip right into cracks and chemically weld it all in a short time... My experience it, put it on, let it dry overnight, polish it, and the crack doesn't grow. Good. I didn't know how well this stuff worked, I just knew that it did, and I havn't gone out to seek the worst of Vistas to fix or anything....
Today I had an opportunity to see if it really worked on things that were split and broken. One of the flourescent lights in my basement blew, and while changing the bulb, I dropped the cover and it broke... into several pieces. It's a cheap thin acrylic.. I started looking for SuperGlue.. then I remembered... I should try this Weld-on stuff. So I held 2 pieces together tightly, put a drop on and SAW it race into the crack.. (clear makes it easier to see) Held it for a minute until it got a little cloudy, and it held.. I kept putting the pieces together and it actually worked.. It was OK to hang back up in a half hour...
So the verdict is... Yeah....... this stuff really bonds plastics... and it doesn't bond your hands together like glues can.
I may start using solvent welds instead of glue for other things around here.. beats glues... and it's got some flex like it did before it broke.