leaking isolating valves worcester bosch rsf230 combi

[ih]

hi all
worcester bosch rsf230 is the boiler. Was loosing pressure so put leaksealer on sunday. after 4 days when cold the pressure is just under 1bar but the isolating valve under the boiler casing with the screw nut still has minute leak when the boiler is cold. when it is hot then no leak.

1. has the leaksealer has head enough time or do i give more time?
2. do i replace one or both the isolating valves flow /return
3. i don't suppose it can be soldered ??
thanking in advance for help and advise.
ih

 

[bengasman]

leak sealer had enough time
might as well do both, can be pig though
no can not be soldered

 

[mickyg]

replace both valves(fun job ) then never look at them again! the leaking is caused by people looking at them, fresh air and water running through them

 

[ih]

thanks guys!!
got the message after replacing the valves and turning them on will wear blind fold!!!
thanks again
ih

 

[hav it]

add fernox leak sealer. then put some lsx around joint. works every time. When you get a bit of heat running through it it will solve the problem.