Hard Copper Wire Solder, Hard Grade #69-388

SKU 69-388
18-gauge copper wire for hard soldering. The phosphorous in this copper solder makes it self fluxing (you can use flux if you choose, but it is not required). Melt temperature: 1310°F. Flow temperature: 1460°F. With this temperature range, small items (jump rings, wire bangle bracelets, rings, approx. 10mm bezels, etc.) can easily be soldered with a butane micro torch. The 4-oz pack is approx. 55 feet! 2022 update: This solder is now more gray than it used to be, so is best for hidden joins rather than exposed seams where color matching is important.
Rough on cutters, so use a heavy-duty set like item #65-507.
Need more info? See More Details and Related Products below.
Brand: R & T
Country of Origin: United States
Bin: 1REC
Sold by: 4-ounce
15% OFF!
Reg. Price:
1 - 3 $14.00
4 - 11$11.50
12+ $9.92
Sale Price(s):
1 – 3$11.90
4 – 11$9.78
12 +$8.43

Estimated Restock Date: 8/22/2022

** Out of Stock **

Sold by: 4-ounce

More Details

Copper solder is considered a hard solder. See Soldering 101 for the differences between the various types of jewelry solders, and the equipment required for each type of solder.

For an overview and brief tutorial on using copper solder, see the copper soldering article at blog.rings-things.com.

See Related Products links (below) for similar items and additional jewelry-making supplies that are often used with this item.

Questions? E-mail us for friendly, expert help!

Approx. Size

18 gauge

Additional Specs

Approx. 55' per pack


93% Copper 7% Phosphorous

Ratings & Reviews

9 Reviews

  • 4 stars
  • 0 reviews
  • 3 stars
  • 0 reviews
  • 2 stars
  • 0 reviews

I love this copper solder!

by Polly (Rings & Things Staff)| 1/31/2013 0:00:00

It's very easy to make soldered links with this copper solder and a butane micro torch. It's nice that you don't need flux. Just heat the parts to be joined, bring the tip of your spool of solder up to the join, and fwoosh, it flows. Remember: solder is not designed to fill gaps (no matter how much I wish it worked that way), so be sure the ends to be joined have a perfect flush fit.

copper wire solder

by Cathy C.| 9/2/2014 0:00:00

So far I have been disappointed with this product. I have not been able to get this solder to flow. I have only been able to get it to heat into small balls that will not flow no matter how hot I get it. I did receive it in a timely manner but have not been able to use it. Very frustrating and at this point I would not recommend it. I will acknowledge that it could be a failure on my end, although I have never had a problem with other solders I have used in the past. -- [R&T Reply: Hello Cathy, We are sorry you are experiencing frustration. We have not had the problem you are experiencing, but here are a few ideas for troubleshooting: Make sure the metal you are soldering is clean. To reduce firescale forming on the surfaces you are joining, use a tripod #69-354-9. Copper wire solder does not require additional flux, but if you are having trouble with it flowing, fluxing the elements you are joining may help the solder flow. I recommend using our self-pickling flux #64-004. Make sure the metal elements you are joining have reached the solder's flow temperature of 1460°F (solder will not flow if the metal is not hot enough). In the "Learn More" tab of this item, we've also added a link to our copper soldering blog article. I hope this helps! Feel free to contact us (Toll Free 1-800-366-2156 Mon-Fri 8-4pm PST) if you need further assistance; or to let us know this was helpful. ~Nate]

Easy to use Copper Solder

by Kim J| 11/6/2014 0:00:00

This was required for a copper soldering class I took.

thank you

by Denis P| 1/13/2015 0:00:00

I received the order really rapidly and got exactly what I wanted. I took a chance to order from you guys since it's my first time with your company and I'm very pleased. Will order again...thank you

Thank you

by Denis P| 3/28/2015 0:00:00

This is the second time that I ordered this product and I must tell you how I am satisfied with this product and the service that I received from you. looking forward to the next order, Denis Picard

copper solder wire :^)

by Rebecca B| 6/30/2015 0:00:00

I am new to copper/silver smithing but I really enjoy using the wire technique to chip soldering. It looks copper after soldering but gray after filing BUT if you just heat the copper piece up again it will turn copper colored again! Most people don't realize this! It's very strong seam after soldering, I like it very much. Great price for such a large amount! ;^)

The Best Copper Solder!

by Leigh| 7/6/2016 0:00:00

I love this solder--it is the best copper solder I have found. Flows easily and (for the most part) retains the copper color so I don't have to plate my finished work. I just came back for more--I started panicking when I realized I was almost out.

Very happy with this solder!

by Alicia| 4/8/2018 0:00:00

My first attempt at using a wire solder. I had no problem getting it to flow (no flux needed) and although I was very heavy handed and had to do a lot of filing (need to practice, practice, practice) it was a quick, solid solder. My only initial disappointment was that it was not copper colored. Filing made it even more gray colored. Then I read someone else's comment about reheating it to make it copper colored again. That worked!!! So if anyone reading this is having the problem of the soldered joint turning out gray (like antique silver), just reheat the joint as if you were annealing the metal, and it becomes copper colored.

Not good with a micro-toch

by Niccolo| 9/17/2018 0:00:00

I have tested this with a butane micro-torch, but I think it doesn't get hot enough to get a good soldering. It does melt, but then it hardens too quick and it doesn't really attach to the item I am soldering (trying to solder a copper ring about 6,7 mm thick, I ma using flux too). Silver soldering works fine with this micro-torch, maybe this copper soldering needs at least a regular butane torch.