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MAIYUM 63-37 Rosin Core Solder Wire is a premium 0.8mm, 50g tin-lead solder with 1.8% rosin flux content. Melting at a low 183ยฐC, it delivers smooth, fast, and strong solder joints ideal for PCB repair, electronics DIY, and home improvement. Its clean, non-corrosive residue and compact spool make it a top choice for professionals and hobbyists alike.




| Asin | B075WB98FJ |
| Best Sellers Rank | #259 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 (22,372) 4.6 out of 5 stars |
| Date First Available | September 24, 2017 |
| Item Model Number | JF850 |
| Item Package Quantity | 1 |
| Item Weight | 1.92 ounces |
| Manufacturer | Shenzhen Joycefook Technology Co., Ltd |
| Material | tin |
| Part Number | JF850 |
| Product Dimensions | 2.17 x 1.18 x 2.17 inches |
| Size | 0.8mm 50g |
User
Nice flowing solder
Great quality solder, does the job and melts nice and easy.
User
High-Quality Solder Wire โ Easy to Use and Reliable
This solder wire works really well! It melts smoothly and flows evenly, making it easy to get clean and strong connections. The quality is great, and itโs perfect for electronics, repairs, and DIY projects. I also like that it heats up quickly and doesnโt leave too much residue. Whether youโre a beginner or experienced, this is a reliable option that gets the job done. Definitely worth it and I would buy again!
User
Smooth-flowing solder that makes clean, reliable joints
The MAIYUM 63/37 tin-lead rosin core solder performs very well for electronics work and small electrical repairs. The 63/37 composition melts quickly and transitions cleanly from liquid to solid, which helps create neat, shiny joints without the grainy look that lower-quality solder sometimes produces. The 0.8mm diameter is also a good balance, small enough for precise work on circuit boards but still easy to control when soldering wires or connectors.The rosin core flux works effectively and helps the solder flow smoothly onto pads and components. It wets surfaces nicely and spreads evenly, which makes it easier to produce strong electrical connections without needing excessive heat. The spool is compact and feeds smoothly without tangling.One helpful tip is to keep the soldering iron tip clean and tinned before starting each joint, since a clean tip transfers heat more efficiently and improves solder flow. It also helps to heat the component and pad first, then feed the solder into the joint rather than directly onto the iron.Overall, this solder wire is reliable, easy to work with, and well suited for electronics repair, DIY projects, and hobby soldering tasks.
User
Good value for money
I didn't want to write a review until I'd tested it extensively on various electronic and electrical soldering projects, and it really is a good solder at a good price. I'm not giving it 5 stars because there are other good quality options that cost a little less and offer the same quality as Maiyum.
User
melts smooth, joints look clean
This solder flows really nicely and wets onto pads without needing to pile heat on which is great for working on delicate components. The joints come out shiny and solid without the grainy look you get from lower quality solder. The rosin core flux does its job well and helps everything flow evenly across the pad. 100 grams is a solid amount and at this price it is basically a no brainer buy for anyone who solders regularly.
User
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:Iโve 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.
User
Must have product
Works like a charm, considering ordering more here shortly.
User
My New Go-To!
This diameter is perfect for precision work โ thin enough for fine-pitch components and SMD soldering, but still has enough mass to handle slightly larger joints without needing to feed too much wire. The 63/37 alloy melts beautifully at a low temperature and gives that smooth, shiny flow I love to see. No cold joints, no hassle.The rosin flux core is just right โ active enough to get clean, bright joints on mildly oxidized parts, but it doesnโt leaveIf youโre looking for reliable, high-quality solder that performs like the old Kester stuff but at a better price, look no further.
User
Excellent quality solder
Solders beautifully, and honestly, just a pleasure to work with. Can't recommend enough!
User
Best product
Good product
User
good product
fast delivery
User
High cospa!
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.
User
Good quality
Works as intended.
Trustpilot
2 months ago
2 days ago