7 Best Brazing Flux Reviews in 2022

Any kind of workshop service or job requires a variety of tools and additional equipment to finish the job properly. One of the most important jobs in any workshop is brazing, which is a pretty common metal joining process.

In this method, one or more metal parts are joined together by high-temperature melting, or by introducing a filler material between the joints to fuse the parts together. As you can imagine, it changes the physical as well as chemical properties of the workpiece. To control the process, the brazing flux is introduced at the time of brazing. If you also perform the brazing process frequently, you should have a reliable can of brazing flux by your side. If you are looking for one, make sure you check out the following factors before buying one.

  • Quantity of Flux: While buying the brazing flux, you should carefully check how much of the flux you are actually getting in the pack. As you will be needing the compound, again and again, you must make sure that you have enough of it and won’t have to run to a nearby store before you start the brazing process.
  • Shelf Life: The shelf life is a factor that is very crucial for products like brazing flux. As you can imagine, all of the brazing flux you are buying will not be used in a single process. But, you might not even need to use it anytime soon if you don’t perform the brazing process frequently. Thus, the compound you are buying must have a good shelf life so that the remaining brazing flux in the can is not wasted over time.
  • Brand: It is always a good idea to buy a manufacturing-related product from a reliable brand. Since chemical compounds like brazing flux are highly volatile and must have the perfect contains, you should always prefer a brand that is popular in the market and offers reliable results. Otherwise, you might not get the results you expected from the compound of the process itself.

If you don’t often buy manufacturing process-related compounds or additives, it might be a little difficult for you to find a decent can of brazing flux. Thus, we have created this list of the best brazing flux present in the market right now. For that, we have shortlisted the best and most popular options in the market. Therefore, you will certainly find the most reliable options right here. If you want to know more about brazing flux, make sure you check out our Buying Guide for the best brazing flux.

Best Brazing Flux 2022

Best Brazing Flux Reviews

1. Harris SSWF1 Stay Silv Brazing Flux

Harris is a well-known brand in the community since it offers the best selection of tools and accessories for professional applications. The brazing flux pack from Harris is one such option and you should prefer that if your requirements are similar.

In the 1st place, we are going to place the most popular option available in the market for a brazing flux. The Harris SSWF1 Brazing Flux has sold a lot of units since it is the best option for professional users. First of all, you will get about 17 oz of brazing flux in this pack which is quite a lot. Even if you are using the flux regularly, such an amount will surely last you a very long time.

Other than that, it is also a high-quality product since Harris SSWF1 Brazing Flux has specified a great temperature range for the flux. You will be able to use the flux within a temperature range of 1050°F – 1600°F range, making it a suitable option for the brazing process over a variety of metals. Most importantly, the Harris SSWF1 Brazing Flux is highly compatible with silver blazing.

Best Features

  • Made by Harris
  • 28 oz brazing flux quantity
  • 75 x 4.75 x 3.38 inches pack size
  • 1050°F – 1600°F active temperature range

Pros

  • Active temperature range is good
  • Suitable for silver blazing
  • Offering the best quantity in this selection

Cons

  • Not suitable for hobbyists or DIY enthusiasts

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2. Forney 37250 Brazing Flux

Forney is yet another highly popular brand for a variety of welding and metalworking peripherals. The following brazing flux from Forney is also designed for professional use and has been a preferred choice of many professionals.

In 2nd place, we have the Forney 37250 Brazing Flux. This is also a popular choice compared to many other brazing flux you can find in the market. One of the main reasons behind that is the ease of usage offered by Forney 37250 Brazing Flux and its durability. And since the product is designed and produced in the USA, you won’t have to worry about the quality.

As for the quantity, you will get about 8 ounces of brazing flux in the 3.63 x 3.63 x 2.63 inches package of Forney 37250 Brazing Flux. While such a quantity is good enough for casual usage, it is not ideal for regular application. If you are buying Forney 37250 Brazing Flux for standard use, make sure you get your hands on multiple packs, keeping the extra options as reserve.

Best Features

  • Made by Forney
  • 8 oz brazing flux quantity
  • 63 x 3.63 x 2.63 inches
  • Easy to use
  • One of the durable options

Pros

  • The brazing flux is produced in USA
  • Small quantity is suitable for storage
  • It also removed surface impurities at a time of brazing

Cons

  • Not an ideal choice for regular use

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3. Hot Max 24184 Aluminum Brazing Flux

Hot Max 24184

Hot Max is offering one of the most premium choices for a brazing flux on our picks today. Apart from the brazing flux, Hot Max also produces appliance hose. propane torch, TIG filter and many other welding-related accessories.

Our 3rd pick for the best brazing flux is coming from Hot Max. The Hot Max 24184 might be a premium choice for a brazing alloy, but it is definitely a reliable option. This flux is designed for welding and works perfectly with the torch blazing process on aluminum. One of the most suited applications for the Hot Max 24184 blazing flux are 4047, 4043 and 1100 brazing alloys.

Apart from that, the Hot Max 24184 blazing flux is also a suitable choice for furnaces and automated flame blazing processes. This compound contains zinc chloride that ensures high performance and avoids oxidation effectively at the time of brazing. The Hot Max 24184 blazing flux is also made in the USA and offers a reliable production quality.

Best Features

  • Made by Harris
  • 5 oz brazing flux quantity
  • ‎3 x 3 x 3 inches
  • Suitable for 4047, 4043 and 1100 brazing filler alloy
  • Contains zinc chloride

Pros

  • Multi-purpose brazing flux
  • It is specifically designed for torch brazing aluminum
  • Zinc chloride content in the flux offers reliable results

Cons

  • Quite a premium option compared to other options

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4. Hobart 770119 Welding Flux Brazing

Hobart 770119 Welding Flux Brazing

If you are looking for a compact blazing flux unit, pay attention to our next pick. The following pick from Hobart is one of their finest offerings including plasma cutters, welding accessories and a variety of safety apparatus.

Next up, we have the Hobart 770119brazing flux. This is also a welding flux that works perfectly fine with brazing applications. Made in the USA, the Hobart 770119 brazing flux offers great performance with no compromises made in terms of quality. As this is a larger option, the Hobart 770119 brazing flux offers about 11.2 ounces of flux within the 3.6 x 3.5 x 2.7 package.

One of the great advantages of Hobart 770119 Welding Flux is that it cleans the contact surface very well and does not leave a lot of residue behind. You can use this brazing flux with bare brass as well without any issue. As there is not a lot of residue left of this brazing flux, it offers better adhesion for the brazing joint, ultimately increasing the lifespan of the joint.

Best Features

  • Made by Hobart
  • 2 oz brazing flux quantity
  • ‎3.6 x 3.5 x 2.7 inches pack size
  • Cleans the surface well
  • Offers great adhesion for the joint

Pros

  • Suitable for bare brass
  • Made in USA
  • Compact package size for the quantity

Cons

  • Quantity might be too much for some buyers

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5. Weldcote Metals Anti-Borax Brazing Flux

Weldcote Metals Anti-Borax Brazing Flux

We have yet another premium brand present on our selection which is Weldcote. Weldcote is also famous for a variety of welding-related apparatus that you can browse for your welding needs.

We have yet another highly premium offering coming from Weldcote on our picks of the best brazing flux. The Weldcote Brazing Flux also manages to deliver a high performance along with a considerable large quantity available in the package. In this ‎6 x 1 x 1 inches package, you will get about 16 oz of brazing flux which is perfect for multiple applications. Weldcote has also specified an active temperature range of 1400°F – 2200°F for the Weldcote Brazing Flux which further ensures its applicability.

The Weldcote Brazing Flux is a highly compatible option and can be used with a variety of options such as brass, bronze, copper, stainless steel, and many other heat-resistant alloys. The anti-borax properties of the Weldcote Brazing Flux allow a deeper penetration of the filler material within the joint for added oxidation protection. As the brazing flux compound removes oxidation at a faster rate, there is no possibility of any impurities or bubble formation at the time of brazing.

Best Features

  • Made by Weldcote
  • 16 oz brazing flux quantity
  • ‎6 x 1 x 1 inches pack size
  • 1400°F – 2200°F active temperature range
  • Anti-borax brazing flux

Pros

  • Anti-borax properties allow deeper filler material penetration
  • Comes with a high active temperature range
  • Suitable for a lot of materials

Cons

  • Most expensive brazing flux on our picks

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6. J W Harris Co Inc SSWF7 Harris Stay Silv Brazing Flux

J W Harris Co Inc

Now that you are familiar with the best premium option for a brazing flux, let us introduce the next option from J W Harris Co is the cheapest option you can find in the market right now.

J W Harris Co, Inc is bringing the most affordable option for a brazing flux on our picks. Even though it is a cheaper option, J W Harris Co, Inc is offering a 6.5 oz quantity with the SSWF7 Brazing Flux. Thus, this brazing flux might be the best choice for DIY applications and one-time usage. Even if you have some left-over flux remaining in the pack, you can keep it stored for a long time since it has a long shelf life.

Despite being the cheapest option, the J W Harris Co, Inc SSWF7 Brazing Flux is backed with 1 warranty period so that you can report to the brand if there is any problem with the quality over this period. However, there won’t be any problem down the line since this is an all-purpose brazing flux which is perfect for low-temperature silver brazing. You can use this flux with both ferrous as well as non-ferrous metals.

Best Features

  • Made by J W Harris Co
  • 5 oz brazing flux quantity
  • 1 year warranty period
  • Suitable for low-temperature silver brazing
  • All-purpose brazing flux

Pros

  • Shelf life is very good
  • Most affordable option in this selection
  • Can be used with ferrous as well as non-ferrous metals

Cons

  • Quantity should have been higher

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7. Hot Max 24000 Brazing Flux Powder

Hot Max 24000 Brazing Flux Powder

Hot Max has managed to lang yet another brazing flux pack on our picks for this list. As there are multiple options available from Hot Max, you should definitely check out the low quantity option mentioned here.

Last but not the least, we have the Hot Max 24000 Brazing Flux Powder. It is rather a budget-friendly option from Hot Max with great specification as well as reliability. This powder is designed for steel, malleable iron, cast iron, and even galvanized metals such as brass, bronze, etc. You can use the flux with either an oxy-acetylene arc torch, or carbon-arc torch, whichever is available in your workshop.

Coming to the active temperature range, the Hot Max 24000 Brazing Flux Powder offers 1400°F – 2200°F temperature range which should cover most brazing processes commonly used in the industry. The Hot Max 24000 Brazing Flux Powder meets various quality standards to offer a reliable performance. Within the 3.5 x 3.5 x 2.5 inches pack size of the Hot Max 24000 Brazing Flux Powder, you will get about 8 ounces of powder that might be a little low considering its applications.

Best Features

  • Made by Hot Max
  • 8 oz brazing flux quantity
  • ‎3.5 x 3.5 x 2.5 inches pack size
  • 1400°F – 2200°F temperature range
  • Works with a variety of metals

Pros

  • Offers great active temperature range
  • Meets many quality standards
  • Works with galvanized metals

Cons

  • QUantity should have been more for the given price

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Buying Guide For The Best Brazing Flux

A brazing flux is not something you buy often. Also, there are a lot of options available in the market since there are a number of brands that are offering high-quality options. Thus, even if you have bought a brazing flux a while back, you should check the best options available right now to get the best product under your budget.

For our list, we have considered various factors such as quantity, chemical properties, reliability, shelf life, etc. Therefore, we can assure you that you will find at least one suitable brazing flux pack from our picks today. If you want to know more about the core qualities of brazing flux, kindly check out our buying guide provided right here.

1. Quality of Flux

Checking the quality of the flux you are using is very important before you go along with the process. As you may already know, the flux you are using for the process has a huge impact on the process as well as the end-result of the brazing process. There are many factors that can affect the quality of the brazing flux such as the environment at the time of prediction, manufacturing process, chemical composition, and many others.

While it is not possible to verify each of these factors, you can get a basic idea about the quality of brazing flux by checking its chemical properties. Most importantly, you should check the active temperature range that is mentioned with most brazing flux packages. This range lets you know the possible applications for the brazing flux and the types of metals you can use it on.

2. Shelf Life

Shelf life is a factor that is mostly considered for manufacturing process related compounds such as brazing flux, lubricators, and even engine oils. In the majority of brazing applications, you will be needing a miniscule amount of flux while brazing 2 metal pieces together. Thus, even the smallest package of brazing flux won’t be utilized completely in a single go.

But, you will also be needing the brazing flux for your next process, whether it is after a month or a year. Thus, the brazing flux you are buying must have a long enough shelf life so that it can be used even after a long time. On the other hand, if you are sure that the brazing flux you are going to buy will be utilized within a week or a month, there is no need to check the shelf life as you will have to buy a new unit after a certain period anyway.

3. Brand and Reliability

It is not always true that a product from a well-known brand is always the best option available in the market. Sometimes, a simple product from a lesser-known brand can offer you a higher value for your money compared to other options. But when it comes to manufacturing tools and other related compounds, it is always a better choice to go with a renowned option.

As these not only affect the process itself, but also the end result and the overall quality of the job, you should always pick a reliable option that is trusted by professionals.  For our list of the best brazing flux, we have only picked up the best options in terms of brand quality and popularity so that you won’t have any issue while using any of the brazing flux mentioned here.

4. Quantity of Flux

Lastly, we will recommend checking the quantity of the brazing flux introduced in a pack. Generally the quantity is represented in the ounces unit and as you might have guessed already, a heavier pack represents more amount of brazing flux inside the box. But, make sure you get the right quantity according to your application.

If you are a hobbyist, you may not need brazing flux any time soon after your current application and thus, there is no need to buy a larger pack and spend significantly higher on the same. Instead, you can go with the smaller option and save some bucks. On the other hand, it is probably a good idea to get large quantities of brazing flux in one go if you frequently use the brazing flux, if not on a daily basis. In such a case, you won’t have to buy a new pack of brazing everyday if you own a pack that offers 11, 16 or 18 ounces of brazing flux in the pack.

FAQs

Q. How to clean brazing flux?

The easiest and most popular method of cleaning the brazing flux is to quench the freshly made metal joint in hot water and soak it completely. If the flux is not getting removed, you can also add up to 25% HCL in the water and create a strong solution to clear out strong residue flux. There are also dedicated flux cleaners available in the market which you can purchase if you have to perform the process frequently.

Q. Is a brazing flux really important for the brazing process?

The brazing flux is a very crucial part of the brazing process. It is basically a chemical compound which is introduced in the process to avoid oxidation of freshly blazed metal parts. Due to the high temperature surface, there is a possibility of oxidation over the surface which can weaken the bond and even result in failure of the process. To avoid that, you must use brazing flux whenever you are performing brazing.

Q. How to use brazing flux?

There are a lot of ways to apply brazing flux while brazing 2 or more metal parts. The only requirement is that the flux flows into the joint completely and covers as much surface area as possible. You can either use a brush to cover the area with flux, or it can be incorporated directly into the filler material like a flux core or flux coated wire rod. However, make sure you don;t apply excessive amounts of brazing flux as it can contaminate the brazed joint.

Conclusion

As we have mentioned before, finding the best brazing flux might not be an easy task since there are hundreds of options available on the market. Apart from branded options, there are also locally manufactured brazing flux packages that aren’t as effective and offer comparatively lesser reliable results. To give you a comprehensive idea about brazing flux, we have prepared this list of the best brazing flux along with a dedicated buying guide that will surely help you. If you are still confused between various options, go with one of our recommendations mentioned below.

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