Brake fluid trick for leaky steering box?

[Sheepdip]

That's an old automatic transmission trick also, don't know that I'd do it to a fresh trans build, but more along trying to limp a high mileage one along.
I have used Lucas P/S Stop Leak fluid with success until I got a new pump/box ordered then installed a few months down the road.
A patch is just that.. a patch, gets you out of a jam or buys a little more time.