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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€6.35 Incl. 23% VAT

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Fernox LS-X Leak Sealer 50ml is rated 4.6 out of 5 by 259.
Rated 5 out of 5 by from Seals every time! This is a great alternative to tape or boss white. Seals every time perfectly on compression fittings and can be disassembled if nessesary. It was first recommended by my plumber mate a couple of years ago. I only use this product now and would highly recomend!
Date published: 2018-01-11
Rated 4 out of 5 by from A Very Good Product This works extremely well on both copper and plastic piping joints. It really does what it says and once opened lasts for years but is a bit expensive.
Date published: 2017-12-26
Rated 5 out of 5 by from Just the job Handy sized tube for the Do it yourselfer replacing a pop-up basin waste.
Date published: 2017-12-18
Rated 5 out of 5 by from Peace of mind. Great item for compression fittings on water pipes. Saves the 'doubt' factor creeping in when you turn the water back on.
Date published: 2017-12-04
Rated 5 out of 5 by from Fernox LS-X Leak Sealer Who needs PTFE these days when you have Fernox LS-X Leak Sealer does the same job but with more uses and easier to use in my opinion a must for any plumbing job
Date published: 2017-12-02
Rated 5 out of 5 by from Old G4Mac Used this Fernox sealer on a awkward to get at shalow bath trap, sealed the leak what more could I ask.
Date published: 2017-11-16
Rated 5 out of 5 by from Very useful stuff Purchased to aid a good seal between an immersion heater blank/nut and tank as the supplied seals and mating surfaces were rather thin. This LS-X worked a treat. Ironically a rad valve started leaking a week latter due to poor original fit/line-up by installer/plumber, applied a dab of LS-X re-tightened and achieved good seal at fist attempt. Useful stuff to have to hand.
Date published: 2017-11-04
Rated 5 out of 5 by from Worth every penny I've recently refitted my bathroom and came to plumb in the towel radiator. 7 attempts to stop one of the valve unions leaking, despite endless attempts with PTFE tape, meant it was likely the radiator thread was mis-engineered and fit for the skip. In desperation I tried this sealant and it worked first time. I'll never fit any plumbing again without a smear of this on the mating faces.
Date published: 2017-10-24
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