Fernox LS-X Leak Sealer 50ml Product Code: 23614

Silicone paste used as an external leak sealer and jointing compound.


  • 1 Year Guarantee
  • Suitable for Compression Joints & Screw Fittings
  • For External Use
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Safety Data Sheet
Additional Information
Technical Specification
  • Brand : Fernox
  • Product Type : Leak Sealer
  • Volume : 50 ml
  • Model No : LS-X
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


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€6.55 Incl. 23% VAT

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Fernox LS-X Leak Sealer 50ml is rated 4.5 out of 5 by 288.
Rated 5 out of 5 by from a must have A definite must have for your tool box, quick and easy to use and it works.
Date published: 2018-10-08
Rated 5 out of 5 by from Leaking soil pipe fix Used to repair a leaking soil pipe. It's holding for now until I can do a proper fix
Date published: 2018-09-22
Rated 5 out of 5 by from It worked a treat! An excellent product, it enabled me, a DIY amateur, to fix a leaky radiator valve joint without too much fuss.
Date published: 2018-09-05
Rated 5 out of 5 by from Great stuff Apply in conjunction with PTFE tape for dry results!
Date published: 2018-09-05
Rated 4 out of 5 by from It could be excellent! Excellent, clean sealant which I always use on compression fittings, Just the smallest smear on the pipe before sliding the olive in place and then another thin smear over the olive before final assembly. No problems when dismantling even after many years. The problem is that when it is needed again, perhaps some weeks later, the screw cap will have cracked and the sealant hardened in the tube. This has happened several times and is not because the cap was overtightened. I suspect that it may be a ploy on the part of Fernox to boost sales. It is also the reason that I didn't award five stars.
Date published: 2018-08-27
Rated 1 out of 5 by from Trade review I needed to stop the smallest weep on a radiator that was coming from a compression fitting. After reading about this product I thought I would give it a go but was wary after seeing some reviews so I also purchased something else (that I know works) that I had used before for this very same task. I gave this stuff a try and was ridiculously disappointed. It’s basically clear silicone with a high price tag. It may seal areas that leak as long as nothing is currently letting water through but it will not stop a leak if water is present regardless of how small the leak. The weeping rad compression fitting I had to sort had a drip about every 20-30 min so you can grasp how little it needed to do but this product still failed. Basically find something else that would do the job I used a silicone adhesive which is more expensive but actually does the job.
Date published: 2018-08-02
Rated 5 out of 5 by from Good stuff Was recommended by my friend who is a plumber so I decided to try it. It’s really easy to use haven’t had any leaks when using it.
Date published: 2018-07-28
Rated 4 out of 5 by from A must have in the toolbox This is one of the best sealers I have used. A must have in the toolbox.
Date published: 2018-07-26
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