here's the problem IN THIS THREAD...
there are 3 DIFFERENT types of lights discussed with 3 totally different designs.
1. the OP has LED clearance lights and the LENS is SEALED, even though it pops out of the base.
and the SPONGEY gasket referenced is UNDER THE ENTIRE ASSEMBLY base, not under the lens.
2. older units used incandescent bulbs that are SERVICEABLE by removing the lens COVER.
that light has a PERIMETER gasket between the lens/base that's a semi firm foam stuff.
those older styles are the focus of the O ring fix (which i found didn't help much)
and that's TOTALLY USELESS on the newer LED clearance lights.
3. your patio light (part number 512288) is YET another design.
so do whatever might work.
4. the 4th light covered in this thread is bob's tail lights
n that's got nothing to do with nothing here....
best'o luck with what ever light is shinning and full of water...