I am torn which route should be taken. On one hand I think the NEC route, as the rain tight stuff is not even necessary, as there are other code sections that already cover this (raceways required to drain, weep holes, wet location conductors, entries below live parts, etc). However if there is going to be a gasket, the product standard needs to have something that actually works, will not get destroyed by the sun, and allows the fitting to be tightened wrench tight. I think the only way to accomplish this would have the gasket be in a machined recess, kind of like an o-ring boss hydraulic fitting. But back to the nec, a TIA maybe the quickest way to address this as it is an emergency in my opinion with thousands of loose fittings being installed every day.