












⚡ Solder smarter, not harder — join the elite DIY pros!
The MAIYUM 63-37 Tin Lead Rosin Core Solder Wire is a premium 0.8mm diameter, 50g spool designed for professional-grade electrical soldering. With a low melting point of 183°C and 1.8% rosin flux core, it delivers smooth flow and strong, reliable joints ideal for circuit boards, repairs, and DIY projects. Highly rated and trusted by thousands, it’s the go-to choice for precision and durability in electronics soldering.




| ASIN | B075WB98FJ |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #294 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Solder |
| Color | 0.8mm 50g |
| Customer Reviews | 4.6 4.6 out of 5 stars (21,446) |
| Date First Available | September 24, 2017 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1.92 ounces |
| Item model number | JF850 |
| Manufacturer | Shenzhen Joycefook Technology Co., Ltd |
| Material | tin |
| Part Number | JF850 |
| Product Dimensions | 2.17 x 1.18 x 2.17 inches |
M**O
High-Quality Solder Wire That Performs Flawlessly
Performance & Use: The MAIYUM 63-37 tin-lead rosin core solder wire is high quality and easy to work with. It flows smoothly and creates strong, reliable joints for all types of electronic repairs. Ease of Use: The wire heats and melts evenly, making soldering precise and controlled. It works well with both small components and larger connections. Durability & Reliability: I’ve used it on multiple electronic projects, and there have been no issues with connectivity or joint strength. The rosin core helps ensure good adhesion and a clean finish. Final Verdict: If you need reliable, high-quality solder for electronics, this MAIYUM wire delivers. Easy to use, dependable, and perfect for repairs or custom projects.
E**N
If you need any wire for a project, look no further. 10/10.
This was a generous amount of wire for the price. I received quality material that worked perfectly with my cheap soldering kit. Overall, this spool allowed me to learn how to solder quickly while providing a durable and accurate experience. The solder was easy to melt and clean, yet provided a great connection and fit on all connections I have used it for. If you need any wire for a project, look no further. 10/10.
M**O
MAIYUM Solder Wire
This solder works really well. It flows smooth, sticks clean, and doesn’t need a lot of heat to make a solid joint. I’ve used it on XT90 and EC5 connectors with 12 and 10 AWG wires. It handled the thick wire and big terminals with no problem, and the joints come out clean and shiny every time. Definitely a good solder for RC work where you’re constantly swapping connectors or repairing leads. For the quality and price, it’s hard to beat.
R**G
Shops
Work great
K**N
Great Stuff
Works Very Well I Love it ...
B**N
Worked great
Nice solder for electrical wires
J**E
Great starter solder for led work
I just started learning to solder for some LED strip projects and switching to this 63/37 rosin core was a big upgrade from the random solder that came with my cheap kit. The 0.6mm thickness is perfect for small LED pads and tight joints — it feeds really controllable, so I’m not dumping way too much solder on the pad like I was before. The 63/37 mix also seems to flow nicer and “snap” into a solid joint quicker, which makes it easier to tell when I’ve actually done it right. The built-in rosin flux honestly helps alot. Before this, I was fighting oxidation and dull joints, and the solder just didn’t want to stick to the copper pads. With this stuff, as long as I keep my tip reasonably clean, it wets the pads and wires way more easily and I’m not having to redo joints over and over. For a beginner that made a big difference in confidence. Only downsides for me: the spool is only 50g, so if you end up doing bigger or multiple projects you’ll chew through it faster than you think. Also, like any rosin core solder, it does smoke a bit and has that flux smell, so you’ll want a fan or at least a window open. But overall, for the price and ease of use, I definitely plan on buying this same roll again when I run out.
D**S
This is good stuff
I build brass models, this stuff is a nice thickness, a good alloy, flows nice. Decent price and delivered!
A**.
fast delivery
B**T
not worthy.
R**N
Works wonderfully as it should
M**A
I don't know why the price is so low for this lead rosin core solder. I love the size for circuit boards and it works well. No issues.
N**N
Works as intended.
Trustpilot
3 weeks ago
1 day ago