acetone or methanol should work. acetone is easiest to find, natch. ketones pretty much destroy any non-fluorinated polymers though. apply a little to both sides with a brush then clamp together. the acetone liquifies (degrades, really) the polymers into monomers on contact, and then the monomers try to reform into polymers as the acetone vaporizes. it's a bit better than cyanoacrolate because it the ketone families tend to leave the monomers together so that you get polymer linkages between the two sides. this makes the bond stronger, as you get all the benefits of having plastic at the joint -- crosslinking, etc.