Nothing wrong with un-sealed bearings, they have been around for much longer that sealed and people never had problems.
If you are worried out weather damage, lithium grease on the races, then pack out the rest with water pump grease, then you will be good for a couple of years use completely submerged in water.
@Teens - Oi, my lo pro is radial front (cause I could not find the right length spokes for crossed) so it must be cool ;-)
Nothing wrong with un-sealed bearings, they have been around for much longer that sealed and people never had problems.
If you are worried out weather damage, lithium grease on the races, then pack out the rest with water pump grease, then you will be good for a couple of years use completely submerged in water.
@Teens - Oi, my lo pro is radial front (cause I could not find the right length spokes for crossed) so it must be cool ;-)