0500 41 41 41
Cookie Reports - Screwfix Cookie Policy


Fernox LS-X Leak Sealer 50ml

Product Code: 23614

50ml. Silicone paste used as an external leak sealer and jointing compound.

Download more information...

Safety Data Sheet (COSHH)



QtyPrice per item
1 - 2 £5.29
3 + £4.76

Add to saved list

Available for deliveryNext Day Delivery
Available for collection from store Store Collection Check stock in your store
Page 1 of 4
Page 1 of 4
Rated 5 out of 5 by Fernox Leak Sealer This product performs excellently for jointing BSP fittings as well as sealing 'old' weaping joints. A must have for all tool boxes! It is silicone based but the fittings are watertight immediately so you do not need to allow time for the paste to cure. NOT FOR USE ON GAS FITTINGS. 12 Oct 2011
Rated 5 out of 5 by A Plumbing Essential Had a couple of weeping connections on new radiators on which I had used traditional PTFE tape without success. Bought this LS-X sealer as a last resort, dismantled and refitted the joints using the LS-X and no leaks since. This is a first rate product and in my opinion essential for all compression/threaded plumbing connections. 23 Sep 2015
Rated 5 out of 5 by very useful Works where nothing else will, always have some in your toolbox! Thicker than most silicone, so resists the water better 14 Sep 2015
Rated 4 out of 5 by Good product Expensive for 50ml of product, quite viscous in use and therefore a little awkward to work with - but performance is excellent. 11 Jul 2015
  • 2015-10-05T16:40:40.973-05:00
  • bvseo_lps, prod_bvrr, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasreviews, tv_105, tr_105
  • loc_en_US, sid_23614, prod, sort_default
Page : 2 3 4 5 next>
1 Question  0 Answers

Screwfix Q&A

Ask your questions. Share your answers.

« Back
I have a weeping joint where the central heating pipe connects to the radiator. I don't really want to drain the pipework down to dismantle the joint. Will this product work by wiping it over the leak?
13 Aug 2015
Customer avatar
Read all my Q&A
0out of 0found this question helpful.
Was this helpful?Yes0No0
1 of 1
  • 2015-10-05T16:37:49.402-05:00
  • bvseo_lps, prod_bvqa, vn_prr_5.6
  • cp-1, bvpage1
  • co_hasquestions
  • loc_en_US, sid_23614, prod, sort_default
1 of 1


Download more info (pdf)

Brand Fernox
Colour Yellow
Manufacturer Guarantee 10 years
Model No LS-X
Pack Size 1
Product Type Leak Sealer
Sealant Adhesive Volume 50 ml
Total Product Weight 75 kg