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9.97$
9.97$
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Description
1. 223 has higher viscosity.
2. 559 has better wettability.
3. "High activity" is more sensitive to temperature compared to ordinary solder flux.
Preservation Method
1. The soldering flux should be kept at 10-25℃.
2. The soldering flux should be used for 12 months.
3. The soldering flux should not be placed in the sun.
Precautions
1. Keep away from children.
2. Avoid contacting with eyes.
3. Avoid repeated contact with skin.
4. Use only with adequate ventilation.
5. In order to be cautious, in the operation, the smoke released by the solvent during operation should be avoided as much as possible, and the skin and mucous membrane tissues should not be contacted for too long. Avoid repeated breathing of vapor.
Warning
1. The copyright of all the above content belongs to the official MECHANIC store, infringement will be investigated!
2. Any forged, smeared, or modified picture are all piracy, and our company reserves the right to pursue its legal responsibility!
3. Products sold in unofficial stores are all pirated, for counterfeit products from other stores, our company cannot guarantee the authenticity and reliability of the quality of the products. If there are quality problems, our company will not be held responsible!
4. If you find that fake and inferior products are sold on the AliExpress platform, you can also feedback to our company for processing, let us work together to maintain market order!

MECHANIC UV223/559 High Activity Solder Flux
Protect The Electronic Components
This flux has stable performance and low volatility, long use cycles, non-toxic, no irritant smell.


High-end Quality & A Unique Formula & Perfect Performance
The residue is colorless and transparent, does not affect the detection, disposable and excellent cleaning performance. Rosin residue is non-corrosive, non-conductive, moisture resistant and fungus resistant.


Superior Fluxing Ability to Improve Soldering Performance
Flux flows smoothly for consistently secure and uniform solder connections with no mess.




Widely Applicable
Suitable for a variety of welding environments, a wide range of applications, with high compatibility.




1* Piston
1* Needle
1* MECHANIC UV Series Solder Flux (Model as your choice.)














Customer Reviews
180 ratings
quick delivery (13)
very good quality (13)
very satisfied (9)
meets requirements (8)
effective (6)
very long delivery (6)
Customer photos (30)
J***o
August 6, 2026
Variant: Color:High Activity UV559 Ships From:China Mainland Weight:25g
work really well!! no residual flux! well packaged and faster shipping!! only orininall product from this store!!
P***n
May 26, 2026
Variant: Color:High Activity UV223 Ships From:China Mainland Weight:25g
Really decent flux for doing HDMI ports. just make sure you use a fume extractor or a very well ventilated area it’s very smoky and stinky.
Buyer from Colombia
October 7, 2026
Variant: Color:UV559 Ships From:China Mainland Weight:25g
Llegó en buen en estado y trae puntas adicionales, súper recomendado.
Buyer from United Kingdom
October 6, 2026
Variant: Color:UV559 Ships From:China Mainland Weight:25g
The item was never shipped, it showed as "Processing" until a seperate package arrived then it jumped to "Delivered". When querying this with the store they simply told me it was delivered but I'm pretty confident there was a mistake somewhere with shipping. Refund issued by AliExpress, not the store.
G***r
September 24, 2026
Variant: Color:High Activity UV559 Ships From:China Mainland Weight:25g
Pas encore testé mais le produit a mis beaucoup de temps pour arriver.
Buyer from Ukraine
September 7, 2026
Variant: Color:High Activity UV559 Ships From:China Mainland Weight:25g
Виглядає якісно, нажаль, ще не користувався, постараюсь доповнити відгук після користування
MECHANIC UV559/223 10cc High Activity Mild Rosin Lead-Free Solder Flux No-Clean Light odor Welding Paste Repair PCB BGA Board
9.97$
9.97$
Quantity:
1
Availability:
Color
Ships From
Weight







