Looking again only one of the 4 wirenuts in the direct bury series is UL -
seems odd. But thats all you need to know. Thanks for the information.

bud-

FYI - the Uraseal kit is UL listed and is a permanent solution.

http://www.uraseal.com/electric/index.htm

Anything with a 'gel' type protection will eventually fail meaning you will
be digging them up again.