Are polulu Micro Metal Gearmotors waterproof?
As one who used those motors - I am almost sure that they aren’t. Unlike non-micro metal gearmotors the gearbox is completely exposed to air. Even if you would use the brackets Pololu provide for those motors which cover the gearbox (items #1086 and #1089), they are made of plastic with no apparent sealing against water. In addition, their terminals are also completely exposed.
None of our gearmotors are designed to be waterproof.