If you are a beginner, and you are going to solder a stained glass then flux is what you should use. Without it, the whole thing is going to be a mess. So, what is the best flux for stained glass?
Flux is a chemical agent that helps in the soldering process by removing oxides from the surfaces of metals. It also prevents the formation of new oxides during the heating process.
There are many brands of flux out there in the market and it can be confusing to choose the right one. But don’t worry, we have got your back. In this article, we will talk about the top 5 best fluxes for stained glass.
Award | Design | Stained Glass Tools | Retailer |
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Best Overall | Best Pick ![]() | Check Price | |
Paste Flux | ![]() | Check Price | |
WaterSoluble Flux | ![]() | Check Price | |
Easy to Use | ![]() | Check Price | |
Oil Based | ![]() | Check Price |
1-Stellar Technical Gel Flux
Best PickBest Overall

Stellar Technical’s Classic 100 Gel Flux is a great choice for stained glass artists. It is easy to use and provides reliable results. You can use it even if you are a novice in soldering. It is also odorless and nonsmoking.
This is also safe and lead-free so you can relax even when kids are around. The flux is non-sticky so it won’t create any mess. The flux makes the soldering process so easy and mess-free.
Reasons to Buy
- Highly effective
- Easy to clean
- Lead and some free
Reasons to Avoid
- None
2- Rectorseal 14000 Regular Paste Flux
Paste Flux

If you’re looking for a quality paste flux, look no further than Rectorseal 14000 1.7-Ounce Nokorode Regular Paste Flux. This superior flux provides excellent wetting action and capillary flow, making it perfect for use in a variety of soldering applications.
This stuff is the real deal. I’ve been using it for years and it never fails to help my soldering job look neat and professional. The best part is that it doesn’t leave a nasty residue like some other fluxes out there – just a nice, clean finish. If you’re looking for a quality flux, Rectorseal is the way to go!
It also features an easy-to-use applicator nozzle that allows for precise placement of the flux. In addition, the flux is highly resistant to charring, making it ideal for use on sensitive electronic components.
Reasons to Buy
- Value for money
- Easy to use
- No mess
Reasons to Avoid
- Only for glass flux
3- La-Co-22194 WaterSoluble Flux
WaterSoluble Flux

Are you looking for a water-soluble, all-weather flux? Well, look no further than La-Co-22194! This product is great for a variety of applications, and it really works to prevent soldering problems caused by oxidation.
I’ve been using it for years, and I highly recommend it to anyone who needs a reliable flux. Just be sure to follow the directions on the bottle – a little goes a long way!
Regular FLUX-OR is a water-soluble flux that meets the ASTM B813 standard. This all-weather flux has NSF and UPC certificates, making it ideal for all types of stained glasses.
Reasons to Buy
- ASTM B813 standard passed
- Easy to apply
- Affordable
Reasons to Avoid
- Not recommended for another soldering
4- Oatey 30011 Paste Flux
Easy to Use

The Oatey 30011 Paste Flux is a top-of-the-line product that does an excellent job at cleaning and flux at the same time. I have found that it has a high flash point, and it stays in suspension under normal weather conditions and temperatures.
The paste flux is used to polish the surface oxidation and improve wetting efficiency. The surrounding metal is also coated to assist prevent copper from turning green.
The only metals that this product is not effective on are aluminum and stainless steel. Overall, I highly recommend the Oatey 30011 Paste Flux for anyone in need of a top-quality flux.
Reasons to Buy
- Good quality flux
- Durable
Reasons to Avoid
- Not for metals
5- Rectorseal Regular Paste Flux Tool
Oil Based

Looking for a soldering paste that does it all? Then the Rectorseal 14020 8-Ounce Nokorode Regular Paste Flux Tool is for you. This handy little tool not only cleans your soldering joint but also fluxes it in one easy operation – saving you time and money.
The special oil base protects the solder joint against corrosive attack, making it ideal for use in areas where there is potential for corrosion. The paste flux is also easy to apply and remove, making it a great choice for those who want to get the job done right the first time.
Plus, its special oil base protects the joint against corrosive attack, ensuring a long-lasting and reliable connection. So why wait? Get your hands on the Rectorseal 14020 8-Ounce Nokorode Regular Paste Flux Tool today!
Reasons to Buy
- Good for stained glass art
- Weather and heat proof
Reasons to Avoid
- None
What to Check When Buying a Flux For Stained Glass Soldering?
When it comes to stained glass soldering, the best flux is key to getting a great finish. But with so many products on the market, how do you know which one is right for your project? Here are a few things to keep in mind when shopping for a new flux.
The first thing to consider is the type of metal you’ll be soldering. Different metals require different types of flux, so it’s important to choose one that’s compatible with the materials you’re working with.
The second thing to think about is the temperature you’ll be soldering at. Some fluxes are designed for high temperatures, while others work best at lower temperatures.
The third thing to consider is the size of your project. Some fluxes temperatures, while others work best at lower temperatures.
The fourth thing to consider is the size of your project. Some fluxes are designed for large projects, while others are better suited for smaller jobs.
Conclusion
These are the 5 best fluxes that you can use for soldering the stained glass at home. If you are a novice you can use these best fluxes for stained glass and can practice before moving to the professional level.
I hope this article helped you in choosing the best flux for your stained glass project. If you have any questions, feel free to leave a comment below and I will get back to you as soon as possible.
Frequently Asked Questions
What type of flux is used for stained glass?
There are a few different types of flux that can be used for stained glass, but the most common and most effective is an acidic flux. This type of flux helps to remove any impurities from the glass surface and allows the solder to flow more smoothly.
Does stained glass need flux?
Yes, in order to get a clean and smooth solder joint, you need to use flux. The flux helps to remove any impurities from the glass surface and allows the solder to flow more smoothly.
What is the best way to apply flux to stained glass?
There are a few different ways that you can apply flux to stained glass, but the most common and most effective way is to use a small paintbrush. This allows you to control the amount of flux that you’re applying and ensures that it’s evenly distributed.
What kind of soldering iron do you use for stained glass?
The best type of soldering iron to use for stained glass is one that has a pointed tip. This allows you to get into tight spaces and corners and ensures that the heat is evenly distributed.