how to seal a very slow dripping joint. Can't be tightened further or opened

[samsg30]

There is drop of water dripping every 10 minutes from a joint between socket and valve. (as shown in the picture).
This was put in place using ptfe tape and tightened to the end. It cannot be tightened any further or remove and refitted with more tape etc.

I believe the leak is so small that it can be repaired by putting some sort of putty / solvent on the joint to contain it within. I am not sure which one though.
Any recommendation on how to fix it.

 

[SimonG]

Bit of paste.

 

[quality]

Loctite 577

 

[samsg30]

Bit of paste.

which one?

In toolstation, I have seen "Evo-stik Plumber's mait" with description - A waterproof non setting putty ideal for sealing spigot and socket joints in sanitary fittings. Will adhere to metal, pcv, vitreous enabels and ceramics.

They cannot provide any advice or help of course... but this sounds the thing to apply to fix dripping? Any one used it before?

 

[thereisawizza]

Loctite 577

 

[SimonG]

Not plumbers mait. Thread sealing compound or paste. Many to choose from.

 

[ShaunCorbs]

Another one for 577

 

[Roger Welton]

another vote for 577, 'tis good stuff

 

[Best]

Whatever you opt for, - you still have to remove the fitting and redo the joint.
No point in trying to seal the outside of it.
The correct amount of ptfe would have sealed on several threaded joints and paste added would have helped.

 

[Dotty]

What's that on?

 

[samsg30]

Whatever you opt for, - you still have to remove the fitting and redo the joint.
No point in trying to seal the outside of it.
The correct amount of ptfe would have sealed on several threaded joints and paste added would have helped.

Really 🙁 I thought loctite 577 can be applied on top of joint .. like glue

Well looks like no other choice now

 

[rpm]

What's that on?

A Douche.

 

[Best]

Really 🙁 I thought loctite 577 can be applied on top of joint .. like glue

Well looks like no other choice now

It still is a thread sealant, just same as ptfe tape or cord seal and unfortunately you need to undo the joint to be sure to make it a lasting seal.
A smear of sealant on outside of joint is just too little of a sealing area to be good

 

[WaterTight]

For applying to the outside (and why not try first, nothing to lose) turn off water and drain if possible (open outlets that are lower) and dry the area thoroughly and then dob on some LS-X liberally. Allow to dry for a few hours and then turn her on. It can work, if you're lucky.

 

[student plumber]

Bite the bullet, remove, redo, oilseal on heating or lsx on potable, would be my choice.
Don't know about anyone else.