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Fernox Powerflow Flux paste, 350g

4.9 (13 reviews)
SKU: 260223155603638 EAN: 5016009190258

Compare 5 prices for Fernox Powerflow Flux paste, 350g — from £15.00 to £30.95 across 5 UK sellers including B & Q, Toolstation, Travis Perkins and more. Save up to £15.95 (52%).

£15.00 5h ago
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Compare Prices from 5 Sellers

Prices updated 13 Apr 2026
2
Toolstation
£15.99 +£0.99
11h
3
Travis Perkins
£23.33 +£8.33
11h
4
Tooled Up
£30.95 +£15.95
11h
5
My Tool Shed
£30.95 +£15.95
11h
#2 Toolstation
11h ago
£15.99 +£0.99
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#3 Travis Perkins
11h ago
£23.33 +£8.33
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#4 Tooled Up
11h ago
£30.95 +£15.95
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#5 My Tool Shed
11h ago
£30.95 +£15.95
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Fernox Powerflow flux is a soft paste applied to joints prior to soldering. Contains no zinc chloride which reduces corrosion concerns Suitable for both lead containing and lead free solder alloys Self cleaning Easy to apply WRAS approved
No specifications available
No features listed
No items listed

Customer Reviews 13

4.9
13 reviews
5 star
12
4 star
0
3 star
1
2 star
0
1 star
0
I Prefer thes Flux
5.0
November 20, 2024
Mick the mender Verified Purchase

We all have the preferred flux we use. I have tried several fluxes and this one suits me the best. Just wash your hands befr going to the loo not a problem on the skin on my hands but it does sting on more sensitve skin

powerflow flux
5.0
January 8, 2024
Chris jfw Verified Purchase

used this for many years find it to be one of the best

Bargain buy
5.0
August 13, 2023
Grinder god Verified Purchase

Good value purchase paid more for a smaller tub from elsewhere

Great flux for cleaning your copper before soldering
5.0
February 26, 2023
dangerous Verified Purchase

Best flux on the market makes cleaning your fittings easy ready for soldering and no bits just flux

5.0
November 6, 2022
anr5f3tiwig0ww2wo99r2hxy5 Verified Purchase
Best there is
5.0
August 21, 2022
Jtg84 Verified Purchase

The only flux to use in my opinion

5.0
July 26, 2022
Shockingtech Verified Purchase
Used for 30 + years,
5.0
December 16, 2021
GB Plumber Verified Purchase

Used for 30+ years, don’t taste very nice though.

My go to flux
5.0
October 27, 2021
Gizmo573 Verified Purchase

Simply clean area and fitting, apply flux and heat and you will get a perfect solder joint.

best copper tube flux on the market
5.0
July 29, 2021
B J Bear 123 Verified Purchase

I have been using this for a number of years with no problems since experiencing another well known make actually eating through the pipe and causing water leaks if not cleaned off. I would not use anything else.

Half full
3.0
July 18, 2021
Bluestar040 Verified Purchase

Does it’s job though tubs recently are almost half full

Reliable
5.0
July 5, 2020
Anko1 Verified Purchase

Used daily. Tried and tested over several years

Works well.
5.0
March 31, 2020
Salty123456789 Verified Purchase

I haven’t used this brand before (for flux). I quite like it. It has a consistency a bit like cemolina - a slightly wet constancy. Compared to my usual brand which is more like Vaseline. It has been working well and I would say that the post soldering residue is less messy that my normal brand. So I will use it again. The tub is too big to have a useable brush in the lid. I have been using a small paint brush and that’s been fine.

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