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Kester 24-6337-0010 44 Rosin Core Solder 63/37 .020 1 lb. Spool

Brand: Kester

4.8 667 ratings

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Industry standard for decades
Excellent solderability to a wide variety of metallization's
High activity rosin core formulation
Leaves bright/shiny solder joints after reflow
Standard core 66 (3.3 percent flux)

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Customer reviews

667 global ratings

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Customers say

Customers find the solder to be of good quality with good flux. They say it works well for SMD components and small PCBs. The solder is easy to work with, flowing smoothly and leaving bright, shiny solder joints.

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Quality Functionality Ease of use Flow Shine Melt rate Value for money Size

97 customers mention "Quality"97 positive0 negative

Customers appreciate the quality of the solder. They say it's good for SMD devices and a top choice for any soldering project. The solder makes perfect solder joints every time with a good temperature-control soldering iron.

"...Not just because it solders so well, but also because it's made in a western country where it's less apt to have toxic chems in some mystery flux..." Read more

"...shiny solder joints and minimal residue, making it the top choice for any soldering project...." Read more

"...The increased flux content (3.3%) and activity (M) make perfect solder joints every time." Read more

"...You get so much for the $$ in both quality and quantity. It is a LOT of solder!" Read more

33 customers mention "Functionality"33 positive0 negative

Customers like the product's functionality. They say it works well with SMD components, melts and sticks to pads easily, and has no issues using this solder. The diameter and solder mix work excellently, and it works great for small PCBs. Some mention that it works better lead-free.

"You won't be disappointed with this solder wire! It consistently delivers impeccable results with its shiny solder joints and minimal residue,..." Read more

"It works very well. I had no issues using this solder. It came perfectly coiled and packaged...." Read more

"Works great on all my small soldering projects around the house...." Read more

"...I do a ton of SMD and IC work, and this solder works extremely well...." Read more

18 customers mention "Ease of use"18 positive0 negative

Customers find the solder easy to work with. It flows smoothly and makes a better joint. They recommend it for beginners as it is odorless and wets faster.

"...on it and tried it side by side with the Kester and the ease of use is very noticeable...." Read more

"...This is seriously life changing. No more soldering frustrations for me, the wire melts right into the perf board holes without any trouble...." Read more

"...Lead solder is the best solder for all types of work it wets faster flows better and makes a better joint...." Read more

"...The Kester solder was much easier to work with, flows easier and left bright shiny connections even after reflow...." Read more

17 customers mention "Flow"17 positive0 negative

Customers like the flow of the product. They mention it works great for reflow and drag soldering, with good conductivity and perfect wetting. The flux has a nice smell and is smooth.

"...You will not be disappointed. It melts like butter, amazing flow and leaves a nice perfect shine...." Read more

"...This stuff melts more easily, flows where it should, and doesn't make those nasty blobs with tails...." Read more

"...The Kester solder was much easier to work with, flows easier and left bright shiny connections even after reflow...." Read more

"...Kester being far Superior in Quality , Strength , Ease of Melting and Flowing ." Read more

17 customers mention "Shine"17 positive0 negative

Customers are satisfied with the solder's shine. They mention it flows well, leaving bright, shiny connections even after reflowing.

"...It consistently delivers impeccable results with its shiny solder joints and minimal residue, making it the top choice for any soldering..." Read more

"...It melts like butter, amazing flow and leaves a nice perfect shine. It’s also easy to clean up with alcohol after soldering...." Read more

"...It's flawlessly shiny, and the smell reminded me of how soldier should smell, just like dad's old rosin core Kester...." Read more

"...solder was much easier to work with, flows easier and left bright shiny connections even after reflow...." Read more

16 customers mention "Melt rate"16 positive0 negative

Customers like the melt rate of the solder. They say it melts quickly and spreads evenly. It has a melting point of 183°C, slightly lower than the more common 60/40 blend. The size and melting point are perfect for tinkering with circuit boards, SMD components, and flows well. The solder heats quickly and flows well.

"...You will not be disappointed. It melts like butter, amazing flow and leaves a nice perfect shine...." Read more

"...This stuff melts more easily, flows where it should, and doesn't make those nasty blobs with tails...." Read more

"...I've used it on circuit boards and on joining wires and it melts and flows perfectly...." Read more

"...This is now the only solder I will use. Super easy to work with, quick melt and always a good joint. I highly recommend." Read more

16 customers mention "Value for money"16 positive0 negative

Customers appreciate the value for money of this solder wire. They say it's quality and worth the price.

"Wow, a one-pound roll of this stuff is worth every dime it cost!..." Read more

"...other options, the quality and longevity it offers make it a worthwhile investment. Don't miss out on this exceptional product." Read more

"...the price is high if you don't solder often, trust me, this is worth it 100x over...." Read more

"...It's worth the slightly higher cost if you are working with delicate electronics...." Read more

12 customers mention "Size"10 positive2 negative

Customers find the size suitable for circuit board tinkering and surface mount components. They appreciate the small diameter, narrow gauge, and easy control with the flux. The flux is stored in a wide-mouth mason jar with a bag of desiccant.

"...A whole pound is a lot for a hobbyist, but it's stored in a wide mouth mason jar with a bag of desiccant, so it'll do non-iso work for decades." Read more

"...This 1 lb roll will last me forever. Went with very small diameter for surface mount components. Connections shine after cooling not dull." Read more

"...The relatively narrow gauge makes it much easier to control...." Read more

"Good size for fine through-hole work. Flux gives perfect wetting and doesn't smell terrible." Read more

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Jarhead
Alpha Solder
Reviewed in the United States on November 21, 2024
Style: Rosin Core SolderVerified Purchase
Wow, a one-pound roll of this stuff is worth every dime it cost! Not just because it solders so well, but also because it's made in a western country where it's less apt to have toxic chems in some mystery flux brew. It has an IEC rating of ROM1, which is a moderately active rosin flux with halides. A whole pound is a lot for a hobbyist, but it's stored in a wide mouth mason jar with a bag of desiccant, so it'll do non-iso work for decades.

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LJM
Best. Solder. Ever.
Reviewed in the United States on June 10, 2024
Style: Rosin Core SolderVerified Purchase
I cannot state that enough - it really is the best. Throw the lead-free in the trash and get this. You will not be disappointed.

It melts like butter, amazing flow and leaves a nice perfect shine. It’s also easy to clean up with alcohol after soldering. You get so much for the $$ in both quality and quantity. It is a LOT of solder!

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2 people found this helpful

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Oscar S.
Top-Notch Solder Wire: Quality that Lasts
Reviewed in the United States on September 16, 2023
Style: Rosin Core SolderVerified Purchase
You won't be disappointed with this solder wire! It consistently delivers impeccable results with its shiny solder joints and minimal residue, making it the top choice for any soldering project.

Even though it's slightly more expensive than other options, the quality and longevity it offers make it a worthwhile investment. Don't miss out on this exceptional product.

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One person found this helpful

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Amazon Customer
great solder
Reviewed in the United States on June 26, 2024
Style: Rosin Core SolderVerified Purchase
First time I used Kester 63/37 solder. The increased flux content (3.3%) and activity (M) make perfect solder joints every time.

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One person found this helpful

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D. Rhodes
Worth the extra money
Reviewed in the United States on May 3, 2019
Style: Rosin Core SolderVerified Purchase
I had always used the cheapest solder I could find until I had some instruction from an electronics teacher with some good quality Kester solder. The difference is huge. I had some cheap solder with Chinese writing on it and tried it side by side with the Kester and the ease of use is very noticeable. This stuff melts more easily, flows where it should, and doesn't make those nasty blobs with tails. I had been thinking I was doing something wrong getting ugly solder joints. Turns out crap solder makes crap joints. Kester solder (with the right ratio) makes excellent solder joints.

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7 people found this helpful

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tom4jean
Great product and seller
Reviewed in the United States on June 1, 2011
Verified Purchase
If you did not already know this is the best solder you can get for electronics projects. The mixture of 63/37 is the best for proper joints that are electrically sound. The fine gauge of this makes it a lot easier to control the amount of solder. Kester is a well known excellent brand. Prior to using this I had issues with either cold solder joints or poor contact at pads because cheaper solders were not bonding properly and making poor contact.
I build amateur radio equipment at home and will not use anything except this solder. There are even some radio kit manufacturers that will not honor a warranty unless this solder is used.
Great Stuff.
The Seller is excellent too. Thy provided a great price and fast shipping with no problems at all. I went to their website afterward and found they carry a lot of great products and I would recommended them.
They had the best price on the solder I could find too.

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13 people found this helpful

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Luis
Soldadura de estaño
Reviewed in the United States on November 13, 2024
Style: Rosin Core SolderVerified Purchase
Le doy esta calificación porque veo que la presentación no es igual al de la imagen de portada de la tienda, no sé cuál es la calidad, pero pienso que debe ser buena

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Luis

Soldadura de estaño
Reviewed in the United States on November 13, 2024
Le doy esta calificación porque veo que la presentación no es igual al de la imagen de portada de la tienda, no sé cuál es la calidad, pero pienso que debe ser buena

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Shirley
Very Good
Reviewed in the United States on December 30, 2022
Style: Rosin Core SolderVerified Purchase
It works very well. I had no issues using this solder. It came perfectly coiled and packaged. My only issue was the tape they used to secure the spool inside the cardboard container. It is secured with a packing tape. This tape was impossible to remove without damaging the paper label on the spool. So now the spool has no information on it. It is a simple fix with a pen. However, I prefer the factory print over my own atrocious handwriting. That is literally the only negative and that is a small gripe.

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4 people found this helpful

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