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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Nov 16 – Nov 18
Recently Viewed
At a glance
- Condition
- New
- Model
- 24-6040-0053
- Weight
- 16 oz
- Power Source
- HAND
- Item Length
- 3 in
- Style Name
- 44 Flux-Cored Wire (Rosin)
- Head Style
- Conical
Features 4
- tin 60% and lead 40%
- Model Number: 24-6040-0053
- Item Package Dimension: 2." L x 2." W x 2." H
- Item Package Weight: 1.053 lb
Specs 21
| Brand | Kester |
|---|---|
| Specific Uses For Product | Professional |
| Power Source | HAND |
| Special Feature | Authentic Kester Soder - Made in the U.S.A., Virtually dominated the field of activated rosin core solders for well over four decades |
| Included Components | 1 |
| Additional Features | Authentic Kester Soder - Made in the U.S.A., Virtually dominated the field of activated rosin core solders for well over four decades |
| Upper Temperature Rating | 250 Degrees Celsius |
| Item Length | 3 Inches |
| Item Weight | 16 Ounces |
| Style Name | 44 Flux-Cored Wire (Rosin) |
| Head Style | Conical |
| Brand Name | Kester |
| Model Number | 24-6040-0053 |
| Manufacturer Part Number | 24-6040-0053 |
| Number of Items | 1 |
| UPC | 767654104255 768249062066 729198107550 |
| Global Trade Identification Number | 55 |
| Industry Standard Identifier | Rosin |
| Item Type Name | SOLDER |
| Unit Count | 1 Count |
| Manufacturer | Kester |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Nov 16 – Nov 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Nice solder
Size: 1
Very nice solder to work with, melts and flows well
Reviewed in the United States on February 28, 2026 by Tim R.
Buy on Amazon - not ebay due due to shrink
Size: 1
Buy sealed on Amazon not eBay where unscruplious sellers will take off a few rounds to pocket and still sell the rest of the roll as new. Excellent solder, using for nearly a decade. I love it has lead (despite industry downplaying that as content.
Reviewed in the United States on December 30, 2025 by Landlessnothomeless
Good stuff
Size: 1
Works well on corroded wires. Flux and solder bond well
Reviewed in the United States on January 28, 2026 by Tyler Durden
The best solder you can buy
Size: 1
I was recently running out of the 60/40 solder I had bought a few years ago for my guitar projects. I happened upon an old package of Kester leaded solder that my dad used many years ago for his occasional soldering projects. It flowed very well, solidified reliably, and the solder joints were consistently good. I eventually ran through my dad's Kester solder and had to shop for another solder. I was surprised to find this Kester solder, and I ordered it right away. Note that I prefer this 0.05" diameter, as it's the same gauge as my father's old solder, and it's the standard size I'm used to. It's helps me to flow more solder when I need it. This Kester solder flows just like the older solder, heating up very quickly and consistently. The difference I notice is that the solder takes a moment longer to solidify. I need to wait a little longer before making sure the joint is firming up. Not a criticism, just an observation. I expect to be using Kester solder for many years to come.
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Reviewed in the United States on October 30, 2020 by Christopher Nieman
The best on the market
Size: 1
This is the only solder I ever use. I have had great luck with it and would highly recommend it to anyone. The flux action of this solder makes it flow very well, leading to clean joints and quicker work. The .05 size is perfect for most projects, but I recommend a lighter gauge like .031 for working with small PCBs and smaller wires. The solder comes with a date of manufacture on the reel, so you will know when it is time to replace it if you have not used it up. IMPORTANT NOTE: Storage and Shelf Life Storage must be in a dry, non-corrosive environment. The surface may lose its shine and appear a dull shade of gray. This is a surface phenomena and is not detrimental to product functionality. Flux cored solder wire has a limited shelf life determined by the alloy used in the wire. For alloys containing more than 70% lead, the shelf life is 2 years from the date of manufacture. Other alloys have a shelf life of 3 years from the date of manufacture.
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Reviewed in the United States on March 13, 2016 by Cat and Otter
Buy this solder
Size: 1
Perfect mix 6040 solder works exactly as expected. Buy this solder.
Reviewed in the United States on May 3, 2026 by Kubulai
Fine Product
Size: 1
This solder is the go-to item for small parts. Works fine though I am always surprised how expensive it is.
Reviewed in the United States on March 13, 2024 by avidreader
It's Kesters. What more is there to say? As good as it gets
Size: 1
Kesters has been around for over a hundred years and this is why, very high quality products. Yes there are cheaper brands out there but Kesters gives consistent quality spool after spool after spool.
Reviewed in the United States on May 24, 2024 by Randall Krippner