For what do you mean Patreek? For rigid styrenes you really should go with plastic welders designed for them. They set quickly, and fuse that type of plastic together. They don't work on PVC type plastics which is what make up 90% of most figures these days.
For that I'm a Devcon Plastic Welder (2-part epoxy type, easily found at hardware stores, WM, Lowes, etc.) which is thicker and a little difficult to work with but works on PVC's pretty well. I'm exploring some PVC welding options too in the future, but for now Devcon's pretty good but the excess dries out fast I've found. Keep it in a baggie sealed, and don't let it get too cold and whatnot.