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Apple released the MacBook Pro 15" Unibody, the second generation of the MacBook Pro, in October 2008 with a new aluminum upper case machined from a single aluminum block.

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Which threadlock to use for MacBook bottom case screws

I recently upgraded the ram in my MBP to do this i had to remove the back case, which i believe has broken the bond that the threadlock had when it was applied in the factory.

Now every 1-2 months i have to retighten all the screws as they keep becoming lose.

I plan to reapply the threadlock but had 2 questions :

- Which specific threadlock should i use, when i search amazon i can find lots but they seem to be for bolts and other 'larger' fixings, is there one specifically made for small electronics screws (i also guess i want one that is undoable ie. not permanent so i can open up the bottom case again if required)

- In applying the new threadlock will i need to clean the old threadlock off first with solvent ?

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Surprising one can use fingernail polish (Clear) as a substitute! Just be careful a little goes a long way.

Nail polish remover or Toluene is the best for cleaning things up.

Loctite - Blue is designed for larger nuts and bolts. To clean it you'll need methylene chloride. But thats not what Apple uses.

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Would like to add that one must use the Blue 242 or similar threadlocker. Stay away from the red permanent threadlocker otherwise you may need to drill the screws out.

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