Bondic is NOT a glue, so don't use it as one! Bondic works best on rough surfaces and even better with undercuts. Bondic solidifies only by exposure to UV light (LED included). Bondic works best in layers (the maximum thickness of one layer is 1- 1.5 mm). Bondic works best when the surface is clean and free of grease. Bondic is solvent free, which is one reason why it doesn't dry out. Bondic is a liquid plastic welder that should be used with the principle of welding and not gluing. Clean, Fill, Cure and Shape in seconds.