On 22/10/2019 18:47, Rednadnerb wrote:
So if the ptfe is doing nothing then epoxy putty and silicone wouldn't do anything either.
What about doubling up on the washer?
It is for a customer so I can't try it at the moment.

I had been assuming that the damage to the end face of the male thread
(or perhaps within the female nut on the hose) was such that the sealing
washer was not able to work. In that case, gluing the lot together with
silicone or epoxy would work, provided you can fill all the leak paths
and not block the flow path. However, it occurs to me that perhaps you
have a failed plastic hose inside the metal spiral, perhaps where the
hose flares out into a flange. In that case the solution is a complete
new flexible hose. They are cheap.