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
Download more information
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

Free delivery on all orders over €70.00

Click here to see information on our delivery charges and times



Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


Click here to see information on returns and cancellation

€6.35 Incl. 20% VAT

Add to Wishlist

More Items to Consider

Loading... Loading...
Fernox LS-X Leak Sealer 50ml is rated 4.6 out of 5 by 245.
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
Rated 5 out of 5 by from Leaks - what leaks This stuff is amazing, I now use it on every plumbing application I need to do at home. Not pleasant on your hands, so gloves are a must. It stops leaks and prevents leaks when using fittings. Excellent.
Date published: 2017-08-20
Rated 5 out of 5 by from Always use this when doing any This is my 2nd tube, as it had been used all up after we replaced all our old radiators with new modern ones. As I said every plumbing job I undertake I always put a film of this on the threads as it makes sure when you put the water back in it doesn't leak and need to be drained down again so in my opinion well worth the cost as it always works I have found although I am not a plumber so don't use it daily as they would.
Date published: 2017-08-18
Rated 4 out of 5 by from Leak stopper A great product that saved the day when all other methods had failed. Easy to apply and still effective 6 months later!
Date published: 2017-08-11
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
  • y_2017, m_9, d_21, h_22
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_245
  • loc_en_GB, sid_23614, prod, sort_[SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_screwfix-ie