Best flux cored wire for a UK gasless MIG
Updated: 18 October 2026
You want one spool from this amazon.co.uk set, for a job you can already describe, and the star averages sit in a narrow band. Best flux cored wire, on this page, means the reel whose diameter, stated mass, and review file match that job. It does not mean a laboratory winner or the highest star. Three pairs of listings share their review text, so adding the twins would fake a most-reviewed claim. The [flux-cored wire comparison](/hub/soldering-and-welding/flux-cored-wire) scores the full grid. Prices are the shelf figures in those files, not a live check on 16 October 2026. We did not weld with these spools. A qualifying purchase can earn a commission at no extra cost to you.
You want one spool from this amazon.co.uk set, for a job you can already describe, and the star averages sit in a narrow band.
You want one spool from this amazon.co.uk set, for a job you can already describe, and the star averages sit in a narrow band. Best flux cored wire, on this page, means the reel whose diameter, stated mass, and review file match that job. It does not mean a laboratory winner or the highest star. Three pairs of listings share their review text, so adding the twins would fake a most-reviewed claim. The flux-cored wire comparison scores the full grid. Prices are the shelf figures in those files, not a live check on 16 October 2026. We did not weld with these spools. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Review file | Diameter | Stated mass | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  HITBOX HITBOX 0.8 mm | 4.6 from 2,580, not twinned | 0.8 mm | 1 kg, buyer weighed over 1 kg | 9.1 | about £14.99 | View offer |
| Alternative |  Reboot Reboot 0.8 mm | 4.4 from 337, own file | 0.8 mm | 0.45 kg, lines agree | 7.6 | about £14.15 | View offer |
| Best value |  SSIMDER SSIMDER 0.8 mm | 4.4 from 81, own file | 0.8 mm | 1 kg title, 986 g weighed | 8.3 | about £12.34 | View offer |
On this page
What best can mean here
Nothing in this set was welded in a lab, and nothing prints a UKCA mark to EN 13479. Weldability SIF’s choosing guide picks flux-cored wire by metal, position, indoor or outdoor work, and the standard the job asks for. Our scores use the amazon.co.uk files: review volume, whether the class is stated honestly, what buyers complained about, the GBP price, and whether the gram lines agree. Shared counts are discounted. Both YESWELDER files show 4.6 from 750. Both FEIFANKE files show 4.6 from 1,818. Both haxiaoer files show 4.7 from 649, and the first review is about a nozzle set.
On that method HITBOX at about £14.99 is the top pick for a normal gasless MIG: 4.6 from 2,580 in a file that is not paired with a twin, and the seller states single-pass use, gasless running, and DCEN. SSIMDER at about £12.34 is the best value because it is the lowest shelf price with its own 81 ratings, not because it welds more cleanly. Class and reel fit are on the buying guide.
A 1 kg spool with its own reviews
The HITBOX listing is a stated 1 kg of 0.8 mm E71T-GS. The seller limits it to a single pass from about 0.8 mm to 4.8 mm and names DCEN. A UK buyer used it on car bodywork. Another weighed the spool at over 1 kg.
The same file records brown smoke and spatter that had to be ground off, and buyers who went back to 0.6 mm for exhaust and thin sheet. One review says to use gas because the product is not flux, which conflicts with the listing. Choose it when you want 0.8 mm, about a kilogram, and a review record that is not a copy of another ASIN. Skip it for 0.6 mm sheet or a structural joint. Polarity and the first arc are on the how to use flux-cored wire page.
Paying less, or buying more wire
SSIMDER at about £12.34 is the best-value top-up when the machine already runs 0.8 mm gasless wire. Reviewers describe ordinary hobby use, sometimes with modest spatter. One buyer weighed 986 g including the reel against a 1 kg title, the item weight is 980 g, and polarity is not stated. Another had thick spots that jammed a 0.035 inch nozzle and had to turn the dial near the top, which then ran too hot for thin material. That is a poor first spool if you have never set tension.
haxiaoer at about £12.99 shares 649 ratings with the 3 kg pack, and the stainless wording contradicts the mild-steel bullets. YESWELDER’s 0.9 kg listing at about £13.99 shares a 750-rating file. Reboot at about £14.15 is the 0.45 kg reel when the door will not take 1 kg. The mass lines agree, and 4.4 from 337 ratings are its own. One buyer found the wire corroded. The YESWELDER titled 4.5 kg at about £35.99 is the bulk 0.8 mm option only after the door has been measured against about 31.6 × 26.5 × 13 cm.
Who should not use this set
Skip every spool here for stainless filler. The titles that say stainless still print E71T-GS and mild steel in the bullets. Skip them for multi-pass structural steel. A classified wire such as E71T-8, with the standard on the label, is a trade-counter purchase. Skip them if the welder cannot run DCEN.
Skip the 1.0 mm FEIFANKE reel at about £17.99 unless the tip is 1.0 mm. Its reviews are the 0.8 mm file, the included line says 0.9 kg, and the item weight is 900 g. Skip AIXZGLOBAL at about £18.99 if you are paying for a 4.6 average from 38 ratings. The top pick is HITBOX for a documented 0.8 mm gasless job. The best value is SSIMDER when you can live with the mass and feed caveats.
Common questions
Which spool has reviews that are not copied from a twin listing?
HITBOX, at 4.6 from 2,580, is the large file with no twin in this set. SSIMDER’s 81 ratings, Reboot’s 337, and AIXZGLOBAL’s 38 are also their own, though the last is a small sample. YESWELDER’s 750, FEIFANKE’s 1,818, and haxiaoer’s 649 each appear on two ASINs. Use those as a shared brand impression, not as six verdicts.
Is the cheapest 1 kg spool the best value?
On shelf price, yes. SSIMDER at about £12.34 is the lowest figure for a nominal 1 kg of 0.8 mm gasless wire, and its reviews are not copied from another listing here. The title mass is soft, polarity is unstated, and one buyer had to run the machine very hot. Best value here means that price with those limits.
Who should buy the 4.5 kg YESWELDER?
Someone who has measured the welder door against about 31.6 × 26.5 × 13 cm, already runs 0.8 mm flux-cored wire without birdnesting, and will use several kilograms before the reel rusts. About £35.99 is attractive per kilogram only in that case. The 750 ratings are the same text as the 0.9 kg listing.
Who should buy the 0.45 kg Reboot?
Buy it when a 1 kg reel will not fit, you want 0.8 mm, and you will check the wire for rust. At about £14.15 for 0.45 kg it is a poor way to stock a machine that can take a larger spool. One buyer found corroded wire that was not usable.
Is 1.0 mm better because two listings use it?
No. 1.0 mm is the right wire when the contact tip and the drive roll are 1.0 mm. In this set that is the FEIFANKE single reel and the haxiaoer three-pack. Most hobby gasless machines here are set up around 0.8 mm. A thicker wire on thin sheet usually means more heat.
Can any of these be called a test winner?
Not from a weld laboratory. No listing cites a British Standard test of that spool. The top pick is an editorial score: HITBOX, because the review file is independent, the mass lines agree, and the seller states DCEN and a single pass. That is not a claim that the bead is porosity-free.
Related pages
Sources
Public UK sources and the amazon.co.uk listings in this set. Shelf prices are the figures in those files, not a fresh scrape on 16 October 2026.
- HSE STSU1, February 2019, mild-steel welding fume (retrieved 16 October 2026)
- HSE, protect your workers from welding fume (retrieved 16 October 2026)
- HSE WL3, welding fume control (retrieved 16 October 2026)
- HSE, health risks of welding (retrieved 16 October 2026)
- Lincoln Electric, flux-cored usability designators (retrieved 16 October 2026)
- Lincoln Steelcore 71T-GS data sheet (retrieved 16 October 2026)
- BSI, BS EN ISO 17632:2015 (retrieved 16 October 2026)
- ESAB UK Coreshield 8 (retrieved 16 October 2026)