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 service up to 3 working days: €8.95

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€6.55 Incl. 23% VAT

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Fernox LS-X Leak Sealer 50ml is rated 4.6 out of 5 by 252.
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
Rated 5 out of 5 by from Superb leak stopper Radiator valve connector was leaking despite using PTFE, and extra tightening on multiple attempts . Used this sealer, left 2hrs to set and hey presto leak free. Wish I used this in the first place.
Date published: 2017-10-09
Rated 5 out of 5 by from Good product This product was bought to seal a leaky waste. It was easy to apply and appears to have done the job
Date published: 2017-10-09
Rated 5 out of 5 by from Got sealant for DIY This product is so versatile. I was left some by a plumber and have used it for multiple purposes ever since. Just replaced the tube on my last visit to a store. I've used it for leak sealing, jointing and even repairing the suction pad on my satnav suction mount, which had deteriorated with age and sunlight! Also successfully sealed leaking mounting bolts on a close coupled WC cistern. A must have in the DIY tool kit.
Date published: 2017-10-09
Rated 4 out of 5 by from Just the job Great product, easy to use and quick to work. Never used this before but would definitely recommend.
Date published: 2017-09-30
Rated 4 out of 5 by from Leak stopper Usually I am OK with compression joints but was having a bad time with plumbing under sink with leaks from olives. Bought this stuff after messing about for a while and wasting time, put some on and all leaks cured, a great product and stress saver
Date published: 2017-09-20
Rated 5 out of 5 by from Great sealant I've never had a leak while I've been using this sealant. Touch wood. Highly recommended
Date published: 2017-09-15
Rated 5 out of 5 by from LSX Had to extend/move pipes to fit a new upright tall radiator and as a DIY'er did not want the expense/hassle of buying a soldering kit so went with compression fittings with a smear of LSX on the olives. Never used this product before but works well,,,,,,no leaks so far!
Date published: 2017-09-03
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