Flomasta Pipe Thread Seal 50g (4373J)

£ 6.39INC VAT

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Flomasta Pipe Thread Seal 50g (4373J)

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Pipe thread seal with high mechanical resistance. For use with all metal threads. Prevents loosening of vibrating parts. Solvent and water-resistant once cured. Easy to dissassemble with hand tools. Prevailing torque: 45-50Nm. Breakaway torque: 45-55Nm.

  • High Mechanical Resistance
  • Solvent
  • Water-Resistant

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View all: Flomasta Sealers & Compounds

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Rated 5 out of 5 by from liquid pipe seal Used to seal compressed fittings where ptfe did not do the job. Followed the instructions to apply and left it over night next day no leaks.
Date published: 2022-03-17
Rated 5 out of 5 by from Great Seal Used on compressed air fittings instead of PTFE tape, and the seal is perfect. Good sized bottle and you use hardly anything on each joint, so it should last a long time. Green colour, so it shows up easily. The only negative is it's easy to get this stuff everywhere. Just apply sparingly and it does a great job.
Date published: 2022-03-10
Rated 5 out of 5 by from Great substitute for PTFE tape This stuff is great and it last as the bootle is 50g. Value for money
Date published: 2021-12-31
Rated 5 out of 5 by from Really good It's a great product. I've applied it to the threads of my shower arm nipples, on the threads of locknuts and around the tip of a copper pipe, slide an olive over it and apply to the olive and tighten the locknut. It starts to set hard within seconds. Literally, within 30 seconds. So once applied, screw in and tighten. However, if applied on the threads, you can leave it until ready to screw in as it doesn't harden unless it has contact with metal and without air. As it's anaerobic, it's works in the absence of air. So it'll only work and harden when applied and screwed in as there's no air there. When there's free air, it'll remain as a liquid. Hence why the bottle is half filled. The air inside stops it setting hard. The amount you get is still the same, which is a legal requirement. Brilliant item and easy to apply. It isn't gunky and is a free flow liquid, almost like an ice cream strawberry syrup, only it's green and I wouldn't advise to eat it.
Date published: 2021-03-08
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Use on an air compressor

Can this be used on the threads of an air compressor which operates at 10 bar? The gap on the threads are bigger than 0.3mm.
Asked by: col001
If the thread gap is more than 0.3mm we do not recommend this product - try our Flomasta pipe sealing cord 80m (2272V) which is ideal for such large gaps.
Answered by: Water Treatment Expert
Date published: 2022-08-27

Can this be used as a thread sealant in a natural gas and LPG installation?

Asked by: Mikexx

our water pressure system goes up to 20 bar/ 280psi willthis sealer work at these levels?

Asked by: olddogg
Pipe Thread Seal is intended for use on good quality tapered threads and is vibration resistant. Its sister product Liquid PTFE may be the better option as its possible to undo the union at a later date. There are many factors that affect the final pressure rating including pipe diameter and whether the material has been applied correctly. You may have better success using a conventional PTFE Tape. Within the flomasta range there are a number of other possible solutions which include pipe sealing cord and gas and water jointing compound. This may be a situation where you need to evaluate several products to find the best solution.
Answered by: Water Treatment Expert
Date published: 2022-06-11

Is this suitable for use on Potable water? Is it WRAS approved?

Asked by: Meliodas
Yes the product is a WRAS Approved Material for use on hot and cold potable water systems.
Answered by: Water Treatment Expert
Date published: 2022-06-02

Is this resistant to fuel ethanol and is it safe / won't attack fiberglass

Asked by: Hotdogs
This product is primarily for threaded pipes used in the plumbing industry. No data for ethanol or fibre glass however it has good compatibility with acetone and can generally be used on common plastics. It’s recommended that you test its suitability for your application.
Answered by: Water Treatment Expert
Date published: 2021-01-15
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Brand Flomasta
Label Info 1: Signal Word Warning
Label Info 2: Hazard Statements H315 Causes skin irritation.H317 May cause an allergic skin reaction.H319 Causes serious eye irritation.H335 May cause respiratory irritation.
Label Info 3: Precautionary Statements P102 Keep out of reach of children.P271 Use only outdoors or in a well-ventilated area.P280 Wear protective gloves/protective clothing/eye protection/face protection.P302 + P352 IF ON SKIN: Wash with plenty of water/…P305 + P351 + P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.P333 + P313 If skin irritation or rash occurs: Get medical advice/attention.P405 Store locked up.P501 Dispose of contents/container to …P261 Avoid breathing dust/fume/gas/mist/vapours/spray.P264 Wash … thoroughly after handling.P272 Contaminated work clothing should not be allowed out of the workplace.P304 + P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.P312 Call a POISON CENTRE/doctor/…/if you feel unwell.P321 Specific treatment (see … on this label).P332 + P313 If skin irritation occurs: Get medical advice/ attention.P337 + P313 If eye irritation persists: Get medical advice/ attention.P362 + P364 Take off contaminated clothing and wash it before reuse.P403 + P233 Store in a well-ventilated place. Keep container tightly closed.
Label Info 5: Hazardous Chemical Content Methacrylic acid, monoester with propane-1,2-diol, 2- hydroxyethyl methacrylate
Manufacturer Guarantee 1 Year Guarantee
Pack Size 1
Pieces in Pack/Case 1
Product Type Pipe Thread Seal
Volume 50 g


Safety Data Sheet (COSHH)