Gorrilla glue seems to work fine for me. Regardles wether you use CA, gorlilla or epoxy, the glue surface needs to be roughed up a bit, cleaned of any dust and then clamped. Be careful when drilling because heat buildup by the drill bit can cause the joints to let go.
Corian adhesive, well I don't think there's any question that is the ultimate glue for corian. It comes in different colors, it has no voids and it doesn't melt loose when drilling. Corian adhesive is very cost prohibitive. You need an aplicator gun. Then you need the glue and then the tips. The gun is expensive, it is not like a typical caulking gun..it pushes two tubes at the same time, rather than just one. The actual adhesive is not expensive. The tips are very expensive..averaging $3-5 each. You need a new tip every time you use the tube! The tip is special. It allows both components of the adhesive to mix inside the tip before it is ejected, so you can squeeze directly onto the surface you are gluing. The set time is so fast, that this is the only way the product can work. You must immediately seam the two pieces together once the glue is applied or it will skim over. If you where to not use a tip and just squeeze the two parts onto a piece of wood and mix by hand..by the time you get it mixed right, it is already skimming over and you haven't even applied it to the surface..but now it's too late! Obviously...because the glue is mixed inside the tip, the tip is destroyed every time you use it. It's the only way to make a kitchen countertop..but not good for pens glue ups.