The 10 Best Soldering Flux for Electronics Reviews & Buying Guide


Whether you are making new electric circuits or repairing existing ones, you will need various tools for the same.

Primarily, this includes tools like a soldering iron and soldering wire which are required for making electrical connections. But to make clean and working connections, you will also need something like the best soldering flux for electronics stated later in this listicle because of these factors:

  • Weight: Soldering flux is something which gets used again and again due to which you will need a lot of it. Hence, make sure to check the quantity or the weight of soldering flux that you are getting. Generally, soldering flux comes in a pack of 2 oz with a few brands even offering 4 oz or 16 oz packs for long term usage.
  • Compliance: Generally, you can use any soldering flux for your electronics projects as they all offer similar uses. But if you want to be assured that your soldering flux is tested properly, then getting something like a RoHS compliant soldering flux can be a great idea.
  • Warranty: As soldering flux is more or less a mix of chemicals, they generally have a shelf life of multiple layers. Although, since you would want your soldering flux to last for as long as possible, checking the warranty offered by it makes a lot of sense. Thankfully, a lot of the soldering flux available out there offers a 1-year warranty.

With these factors in mind, choosing the right soldering flux for electronics should be fairly easy. But, if you want to be completely sure that you are buying the best one, then you should also check their specifications and details along with a detailed buying guide that you will find mentioned down below. Using these details, you will be able to buy the best soldering flux for electronics after reaching the end of this article.

Best Soldering Flux for Electronics

Top Soldering Flux for Electronics

1. SRA Soldering Products Rosin Paste Flux

SRA Soldering Products Rosin Paste Flux

SRA is a highly popular brand of soldering flux that not only offers tested and reliable products, but they also happen to be made in the USA which a lot of buyers look for.

The SRA Rosin soldering flux for electronics comes at the 1st position of this listicle because it can be a great made in the USA option for many. With this soldering flux, you get a pack size of 2 oz which is quite decent.

Another great thing about this soldering flux for electronics is that it includes a 1-year warranty which is always great to have. It can be a great pick for using with tin, lead, and lead-free alloys without any issues. Although, it lacks any kind of RoHS compliance rating.

Best Features:

  • Comes in a pack size of 2 oz
  • Includes a warranty period of 1 year

Pros:

  • Made in the USA
  • Works great with tin, lead, and lead-free alloys
  • Decent warranty for long term usage

Cons:

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2. La-Co Soldering Flux Paste

La-Co Soldering Flux Paste

If you want a soldering flux that is not only ideal for heavy-duty usage but also a made in USA offering like the previous one, then the LaCo soldering flux can be an ideal option.

LaCo’s 22107 soldering flux for electronics comes at the 2nd position of this list since you get a very large pack with this one. As this soldering flux for electronics comes in a pack size of 16 oz, you can expect it to last for a very long time with ease.

While the quantity can certainly last for a long time, you do not get any warranty with LaCo and its soldering flux offerings which can be a bummer for many. A great thing about this soldering flux is that it meets the mil. spec. mil-F 4995 making it one of the most versatile and handy soldering flux options out there.

Best Features:

  • Comes in a pack size of 16 oz
  • Meets the mil. spec. mil-F 4995 standard

Pros:

  • Flux made in the USA
  • Large quantity in a single pack
  • Versatile and compatible with various metals used for soldering

Cons:

  • Misses out on a manufacturer warranty

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3. Delcast Rosin Soldering Flux Paste

Delcast Rosin Soldering Flux Paste

Even though most soldering flux for electronics are not expensive, some of you might be looking for cheaper options where Delcast and its offerings can be a viable option for many.

This Delcast Rosin soldering flux for electronics comes at the 3rd position of this article as it happens to be the cheapest option stated here. Because of the lower price tag, it makes for a great pick for buyers on a budget.

Even though it has a fairly low price tag, you still get a decent quantity of 1.7637 oz flux inside. This flux can also last for pretty long thanks to the included 1-year warranty. Although, being a budget-friendly brand, you cannot expect RoHS compliance from its soldering flux.

Best Features:

  • Comes in a pack size of 1.7637 oz
  • Includes a warranty period of 1 year

Pros:

  • Entry-level soldering flux for electronics
  • Long warranty for a budget offering
  • Decent quantity in pack

Cons:

  • Not a RoHS compliant soldering flux

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4. MG Chemicals Rosin Flux Paste

MG Chemicals Rosin Flux Paste

As you can most likely tell by the name, MG Chemicals is a brand of chemicals that offers various related products including a soldering flux made for electronics usage.

Because MG Chemicals is a company dealing in chemical products, its 8342 RA Rosin soldering flux for electronics mentioned here is a highly effective one. Inside each pack, you will get a total of 1.7637 oz of soldering flux which is quite decent.

And as you would expect at its given price, you also get a 1-year warranty with this soldering flux. Since MG Chemicals is a brand of chemicals, its soldering flux uses some of the most effective chemicals allowing it to offer excellent cleaning results.

Best Features:

  • Comes in a pack size of 1.7637 oz
  • Includes a 1 year warranty period

Pros:

  • Uses high-quality chemicals
  • Decent warranty period
  • Standard weight in each pack

Cons:

  • A bit on the expensive side for some

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5. Youland Soldering Rosin Flux

Youland Soldering Rosin Flux

YouLand is a brand of all kinds of accessories related to all kinds of products including its soldering flux which is made for electronics usage and for working on electrical circuits.

If you are buying soldering flux for electronics, then there is a highly likely chance that you also want other related accessories. This is exactly what the YouLand soldering flux offers to its buyer. Talking about the soldering flux, it comes with 0.35274 oz of flux in each pack.

Other than the flux, you will also find a 60/40 soldering wire of 0.6 mm thickness which is quite decent. There is even a soldering iron tip cleaner included in the box that can be used along with soldering flux to prevent oxidation. Unfortunately, being a smaller brand, YouLand lacks any kind of manufacturer warranty.

Best Features:

  • Comes in a pack size of 0.35274 oz
  • Includes a warranty period of 1 year

Pros:

  • Made in the USA
  • Works great with tin, lead, and lead-free alloys
  • Decent warranty for long term usage

Cons:

  • Does not include any warranty

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6. RadioShack Rosin Soldering Flux Paste

RadioShack Rosin Soldering Flux Paste

Those of you who work on electronics and electrical circuits quite often must be familiar with RadioShack as it offers a wide range of related accessories including soldering flux for electronics.

As RadioShack is quite popular and reputable, its Rosin soldering flux is a great high-quality option for buyers. Just like many other options, this one is also made in the USA. Coming to the pack size, you will find 2 oz of soldering flux in each pack.

While RadioShack does offer a warranty to the user, it is a bit limited at just 90 days of total warranty period. Unlike many other soldering flux options, this one uses a non-spill formula which ensures that the flux does not get everywhere while working on electrical circuits.

Best Features:

  • Comes in a pack size of 2 oz
  • Includes a warranty period of 90 days

Pros:

  • Manufactured in the states
  • Standard pack size
  • Uses a spill-free formula for the soldering flux

Cons:

  • Warranty period could have been longer

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7. Rectorseal Paste Flux

Rectorseal Paste Flux

Unlike its name, Rectorseal also offers soldering related products and chemicals where its soldering flux model can be a viable option for heavy-duty usage.

Those of you who want a soldering flux for heavy-duty usage can consider the Rectorseal 14010 soldering flux. In comparison to most other offerings out there, this soldering flux comes in a slightly larger pack size of 4 oz making it last longer than others.

To ensure that this soldering flux can last as long as its quantity lasts, Rectorseal even includes a 1-year long warranty with the soldering flux making it ideal for many. However, if you want a RoHS compliant soldering flux, you should look elsewhere.

Best Features:

  • Comes in a pack size of 4 oz
  • Includes a warranty period of 1 year

Pros:

  • Ideal for heavy-duty usage
  • Long-lasting soldering flux
  • Works with 95/5 and other common solders

Cons:

  • Does not offer RoHS compliance

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8. MIYAKO Rosin Soldering Flux Past

MIYAKO Rosin Soldering Flux Past

Miyako can be another great option if you want soldering flux that is not only affordable but also offers results to other expensive options in the market.

The Miyako Rosin soldering flux for electronics can be a viable option if you have a tight budget and simply want something cheap and budget-friendly. Despite being an entry-level soldering flux in comparison with others, this one still offers a total of 1.7637 oz in the pack.

Unlike most other budget offerings, this is a high-quality soldering flux that offers great results when used with tin, lead, and lead-free alloy solders. That being said, since Miyako is a budget offering, it misses out on a manufacturer warranty.

Best Features:

  • Comes in a pack size of 1.7637 oz
  • Works with tin, lead, and lead-free alloys

Pros:

  • Entry-level and budget-friendly
  • Good capacity for the given price
  • Offers a smooth welding surface

Cons:

  • Misses out on a manufacturer’s warranty

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9. CAIG LABS Rosin Flux Soldering Paste

CAIG LABS Rosin Flux Soldering Paste

In case that you do not have any budget restrictions and want something premium, then you can check out Caig Labs and its offerings stated here in this listicle.

Caig Labs’ RSF-R80-2 Rosin soldering flux for electronics happens to be one of the most premium offerings out there. Thanks to its premium price tag, it is a RoHS compliance soldering flux that can even work with brass and nickel.

Another thing which is to be expected from such a high-end offering is the 1 year long warranty period that it offers to the user. Unfortunately, its capacity is slightly low for a premium option as you get only 1.97534 oz of soldering flux in each pack.

Best Features:

  • Comes in a pack size of 1.97534 oz
  • Includes a warranty period of 1 year

Pros:

  • RoHS compliant soldering flux
  • Highly effective soldering flux with nickel and brass
  • Standard warranty period

Cons:

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10. Thermaltronics Rosin Flux Paste

Thermaltronics Rosin Flux Paste

Arriving at the final soldering flux pick in this listicle, we have Thermaltronics that happens to be another budget-friendly option for many buyers thanks to its lower price tag.

This Thermaltronics TMT-FP-1 Rosin soldering flux for electronics can be another viable option if you want a RoHS compliant soldering flux. Other than being highly effective thanks to the RoHS compliance, it also includes a standard capacity of 2 oz inside each pack.

You can use this soldering flux for both lead-based and lead-free soldering applications making it quite versatile. However, you only get a 90-day long warranty with this soldering flux which is lower than others.

Best Features:

  • Comes in a pack size of 2 oz
  • Includes a warranty period of 90 day

Pros:

  • RoHS compliant soldering flux
  • Entry-level soldering flux
  • Works with both lead-based and lead-free solders

Cons:

  • Not the longest warranty period

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Buying Guide for the Best Soldering Flux for Electronics

When you are working on electrical circuits, making a connection is quite easy with the help of a soldering iron. But, to make sure that your electrical connections stay functional for a long time without getting oxidized, then you should consider using one of the best soldering flux for electronics discussed above.

Along with all of these soldering flux options, you will also find related information like their important features and details. And for those of you who are interested in knowing more about soldering flux, we present you with this buying guide for the best soldering flux for electronics:

Weight

Within a single electrical circuit, you have to make a lot of electrical connections using your soldering iron. And if you are going to work on a lot of electrical circuits, then it also means that you will need a lot of soldering flux for such heavy-duty usage.

And thus, you should check the weight rating of your soldering flux before buying one. Typically, soldering flux for electronics comes in pack sizes of around 2 oz. Although, those of you who want something more ideal for heavy-duty usage can also find bigger packs of 4 oz or even 16 oz while buying soldering flux.

Compliance

In case if you are not familiar with soldering flux, it is more or less a mix of chemicals that are useful for cleaning electrical connections after you solder them. Thankfully, most of the soldering flux options out there use similar chemical compositions.

And thus, you can expect them to offer very similar performance. Although, if you want something that will surely offer excellent results, then you should get a soldering flux that is RoHS compliant. Such soldering flux options are tested for optimum results under all sorts of circumstances.

Warranty

As mentioned earlier, soldering flux for electronics is more or less a mix of chemicals. Due to this, they offer a shelf life of multiple years. Even if you use your soldering flux after a long time, it will most likely work just fine.

However, if you are getting a premium soldering flux, you would want to be assured that yours will last at least a few years. Generally, these offer a 1-year warranty which is pretty good.

Conclusion

Those of you who are familiar with soldering electrical connections on electrical circuits must know that these electrical connections can get oxidized if not done properly. Such oxidized electrical connections can even break quite easily after some time. To prevent such issues, it is highly advised to use something like the best soldering flux for electronics stated earlier in this article for cleaning your electrical connections made using a soldering iron.

However, if you are wondering about which soldering flux is the right one for you, then consider going with our ideal recommendations:

  • In case you are on a budget and want an affordable soldering flux, then considering the Delcast Rosin soldering flux can be a great idea. Despite being the cheapest flux offering in this listicle, it still offers a decent quantity of 1.7637 oz. And unlike other cheap soldering flux options in the market, this one also offers a 1-year
  • If you are buying soldering flux for electronics, then there is a very high chance that you will need other accessories as well. For such, the YouLand soldering flux makes perfect sense. While it only offers 0.35274 oz soldering flux, you get a soldering iron tip cleaner and 0.6 mm soldering wire combined along with it making a great combo pack for many.
  • Those of you who work on electrical circuits quite often should get something with a larger pack size. One such option can be the LaCo soldering flux for electronics. In comparison with other flux options, this one comes in a very large pack size of 16 oz which is much more than most buyers will need.

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