Fundamentally, glue is an adhesive that sticks two fractured parts together. For those two parts to stick together and become one, they have to be fit together perfectly. Glue does not replace missing parts, and it also does not produce 3D properties. UV light glue needs pressure between two parts to work. Bondic, on the other hand, provides adhesive properties that are plastic in a liquid format — that means the two fractured parts do not have to be perfectly fit for it to work. To add to that, with Bondic, you can replace the missing parts by making them out of thin air.