Flomasta PTFE Liquid 50g (5321J)

£ 6.37INC VAT

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Flomasta PTFE Liquid 50g (5321J)

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Part anaerobic adhesive with PTFE liquid for use with all metal threads in hot and cold water, gas and compressed air systems. Cures rapidly sealing gaps to 0.3mm. Solvent and water-resistant once cured. Easy to disassemble with hand tools. Prevailing torque: 15-20Nm. Breakaway torque: 20-28Nm.

  • Solvent
  • Water-Resistant

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View all: Flomasta Sealers & Compounds

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Rated 1 out of 5 by from Would not cure I tried using this to seal a metal threaded valve body to a Hozelock fitting. I absolutely could not get the stuff to cure even though there were no large gaps. It’s anaerobic no I even tried coating the small bead of material that was visible at the end of the joint with epoxy but not even that helped. Very disappointing.
Date published: 2022-04-25
Rated 5 out of 5 by from Flowasta PTFE liquid Late convert to this product. New mains water pipe,plastic onto metal & plastic on plastic was weeping. Used this & instantly stopped all drips. Will definitely use again. Not a great amount of product in the bottle & probably won't last for many jobs, however, worth the expense to prevent leaks.
Date published: 2022-04-22
Rated 5 out of 5 by from What a lifesaver Having just fitted two new aluminium radiators; they both had leaks at the valves, both were well taped with PTFE tape. Overtightening was not an option with the aluminium. A friend told me about liquid PTFE. My very friendly local Screwfix had this in for me by next day. This must be a plumbers dream, it makes assembly very easy by lubricating the threads, an absolute 'doddle' to apply and a minimum of tightening necessary. Now NO LEAKS. A toolkit necessity.
Date published: 2022-03-04
Rated 5 out of 5 by from Plumber Been using liquid ptfe for years never had a problem, but the brand i use is very expensive, this on the other hand is a fraction of the price and does the same job only recently started using this product but no issues so far .my apprentice takes a couple of minutes to make up a radiator now very pleased
Date published: 2021-12-11
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can it be used on kerosene fitting

weeping brass fitting redone with tape not as bad but still sight weep
Asked by: reckdun
Hello reckdun, Yes, this can be used on Kerosene. Thank you for using Q&A
Answered by: Cwalm
Date published: 2021-04-29

Thread size

What size Thread can you apply the liquid Ptfe too i.e 1' threaded male fitting for a hot water cylinder
Asked by: Nhplumber
Hello, Thank you for using Q&A. The supplier has advised: Liquid PTFE will work with any pipe size in a domestic application. It’s WRAS approved for cold and hot water use. It can fill a thread gap of up to 0.3mm - follow instructions on the pack - the back label opens up as a booklet and contains further information on usage. Hope that helps. MH
Answered by: Screwfix778
Date published: 2020-08-14

Can I use this on a steam fitting (4.5 bar max)?

Replacing steam solenoid valve on domestic steam iron.
Asked by: TheOtherGeorgeK

When can I turn the water on?

I am going to use this on the SS outflow fittings of a domestic submersible pump which supplies water for the house. The pump is 3 bar. The temp is 20deg. Do I have to wait 72 hours before turning on the pump? (Which would be difficult) Thanks.
Asked by: Gjh29
Stainless Steel takes 72 hours to fully cure. The percentage cure versus time is non-linear. 70% pressurisation is achieved after 24 hours.
Answered by: Water Treatment Expert
Date published: 2022-05-10

has flowmasta liquid ptfe got a shelf life

Asked by: shedlen
Yes the shelf like is 36 months and there is an expiry date on the product - which is of course based on the product remaining unopened. If the product has been opened and used this period will reduce.
Answered by: Water Treatment Expert
Date published: 2021-12-20
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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 PTFE Liquid
Temperature Range -50 to 150 °C
Volume 50 g


Safety Data Sheet (COSHH)