I've added Bondic to my adhesives box, and after getting to know better its capabilities and limitations, am very happy and satisfied with the product. It's not really a glue or adhesive as much as a plastic maker, meaning, if you have a gap, or geometry that an irregularly shaped plug can fit, Bondic will work well to fill that.
It clings to smooth surfaces, but not tenaciously, so it can be popped or scraped off very easily (
from the FAQ). If you want it to use Bondic on a very smooth surface, you have to give it an anchor, like a small screw or rod onto which it can hold.
It fills gaps, and can be built up in layers. It sands and cuts like a tough plastic, because it is a tough plastic.
If you're trying to join pieces with close tolerances, this isn't the bonder to use. Ironically, new kits that are engineered well, probably won't benefit from Bondic, but those older garage kits, with the huge gaps, that were crudely parted for production, can benefit with Bondic's gap-filling properties (this would've been great to have in the late 80s and early 90s!)
I've used Bondic to fill chips and cracks in a granite countertop, fix automotive cell-phone holders, and cracked TV remote battery covers. Anywhere a blob of plastic can provide a fix (and a light can shine), this stuff works.