WD-40 secret formula lives in a San Diego bank vault

It's one of the most recognizable names on any garage shelf, under kitchen sinks and tucked into most tool belts. And for years, its hand-written secret formula has lived in a San Diego bank, a place where many know its location but few can visit.
It’s one of the most recognizable names on any garage shelf, under kitchen sinks and tucked into most tool belts. And for years, its hand-written secret formula has lived in a San Diego bank, a place where many know its location but few can visit.

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TIL the secret formula for WD-40 is stored in a bank vault and has only left it twice; once was on its 50th birthday when the CEO of WD-40 rode through Times

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TIL the secret formula for WD-40 is stored in a bank vault and has only left it twice; once was on its 50th birthday when the CEO of WD-40 rode through Times Square on a horse with a suit of armor on and the formula in hand : r/todayilearned