Flomasta Pipe Thread Seal 50g (4373J)

£ 5.99INC 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.

  • High Mechanical Resistance
  • Solvent
  • Water-Resistant

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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
Rated 5 out of 5 by from Good product This does exactly what it is supposed to do at a fraction of the price of other products
Date published: 2020-12-31
Rated 5 out of 5 by from Much better than PTFE tape I was sick fed up of my pressure washer quick release couplings loosening off and leaking, causing the pump auto-stop to pulse annoyingly. So I was recommended this stuff. I used, tightened up all the couplings and in 6 months not one of the couplings has loosened off or leaked and my pressure washer is silent unless I use it. And when I had to change my gun, it just undid as if it wasn’t there. It cleans off easily as well. What can I say? It’s awesome!
Date published: 2020-12-25
Rated 4 out of 5 by from Great product if used properly I have had a leak after using this but I now appreciate that I hadn't used it properly. 1. It works on metal-to-metal surfaces - if you use PTFE tape it weakens the joint 2. It takes a few hours to set and once fully cured it is rock hard. If you disturb it after that it shatters, destroying the seal. So, don't do 'belt and braces' and complete adjacent work before it sets. It is easy to use and effective.
Date published: 2020-12-20
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Can this product be used on thermal Solar on brass treads and fittings , where the system is fill with part Glycol

Asked by: Drewe7

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


can this be used to seal stainless steel, galvanised steel pipe threads for use with making an alcohol dispenser? Will the alcohol compromise the seal?
Asked by: SOwens10
You do not say what the application is - if the alcohol is for consumption it’s less likely to be compatible with the galvanised steel and would not recommend its use - if not for consumption the product will seal galvanised to stainless - allow 72 hours for a full cure. No data for alcohol compatibility but the product can be used with acetone. Also bear in mind that this product will lock the thread and it will be difficult to disassemble - if you do need to disassemble consider using our Liquid PTFE product.
Answered by: Water Treatment Expert
Date published: 2020-10-12

Kerosene compression fittings

Can this be used on kerosene compression fittings for oil fueled boilers?
Asked by: MuckaDaz
This product is suitable for most industrial fluids (including drinking water to 23C) and gases. Its not recommended for use in pure oxygen systems or chlorine or other strong oxidising materials. It should therefore be suitable for your application.
Answered by: Water Treatment Expert
Date published: 2020-08-16

PVC pipe seal

Can this be used on Pvc pipe thread for a U-Bend?
Asked by: Marky87
No it is for metal threads
Answered by: AGVPH
Date published: 2020-08-29
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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)