Laser Pointer Forums - Discuss Laser Pointers | High Power Lasers

No idea how odd this situation is but I have a pretty powerful 445nm 2.3W laser with an aluminum body and copper heat sink. Out front is the lens and focusing barrel (?) but where the barrel meets the heat sink, it's loose. It should be firm in place but I'm guessing due to the heat, the glue wore off over time. Wondering what the best course of action would be, whether it's thermal paste or a specific type of glue? I'm pretty noobish, so any help is appreciated. TIA.