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
  • Sealant Adhesive Volume : 50 ml
  • 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


Standard delivery: €15

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€6.55 Incl. 20% VAT

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Fernox LS-X Leak Sealer 50ml is rated 4.6 out of 5 by 241.
Rated 5 out of 5 by from Wish I'd discovered before I used this to seal a tail into a radiator that leaked when I used PTFE. I smeared a little from the tube around the thread and screwed it in. A quick nip with a spanner and it's sealed. Not a drop of leak. The instructions are confusing because it says no need to drain just relieve the pressure but also takes 2 to 12 hours to set. I left it 2 hours and it was perfect. Completely recommended.
Date published: 2017-08-01
Rated 5 out of 5 by from Great Stuff I had a leaking discontinued part on my really old boiler, I could not find any way of replacing it so I repaired the leak with this and it did the job a treat!
Date published: 2017-07-28
Rated 5 out of 5 by from Strong and trusted product This product has proved itself to be a reliable asset in my toolbox, highly recommend every box should have one.
Date published: 2017-07-21
Rated 1 out of 5 by from 95% of contents usually wasted Not a bad sealer but inevitably the silicon round the cap area will harden even if you screw the back cap on tightly. After you've used it a few times it'll soon become unusable as it bungs up round the cap - then have to resort to puncturing the tube down the side to squeeze a bit out - what a waste!. Won't be using it again - stick to Hawk White.
Date published: 2017-07-05
Rated 5 out of 5 by from Worth buying I have found this product superb in fixing minor leaks and when assembling joints. Works almost straight away. Only marked down for value as a bit expensive for a small tube but cheaper than a leak !
Date published: 2017-06-28
Rated 5 out of 5 by from Excellent product Brother in law fitted a new inlet valve on the toilet and used this to seal it in, valve fitted in minutes and no leaks yea
Date published: 2017-06-27
Rated 5 out of 5 by from Great stuff I have used this for years and it's great. recently changed the siphon in my toilet cistern and, either didn't do it up tight enough or the plastic washer wasn't any good, as I had a leak. No matter a slather of LSX on it retighten, let it set and job's a good un. Have also used for sealing leaks on copper fittings and does the job there too.
Date published: 2017-06-22
Rated 5 out of 5 by from Lifesaver Used this product on an over tightened shower valve that had a slow weep. Tried ptfe, then more ptfe with no luck. Ls x worked first time. Will probably use it on any compression joint in future
Date published: 2017-06-14
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