TotalBoat TableTop Epoxy will form a very strong bond to aluminum substrates only if they have been prepared properly.
The aluminum substrate must be cleaned of any surface contaminants, then sanded until the metal is clean and shiny, and/or etched with an aluminum etching product such as TotalBoat Aluminum Boat Etch Wash. Etching the metal directly after sanding will provide the best surface for any epoxy material to bond to. Sanding will give a slightly rough surface, while the etch will clean, brighten, and promote the best conditions for the epoxy to bond properly. After etching, rinse the surface thoroughly with fresh, clean water and dry the surface completely. Apply TableTop Epoxy within 1 hour of etching or sanding the surface. If any dampness is still present when the epoxy is applied, it may present itself as milky or white areas in the cured epoxy.