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1.7 oz. Lead-Free Water Soluble Solder Tinning Flux Paste

  • Flux is made with a water-soluble formula
  • Suitable for use with standard solder alloys
  • Ideally used as a copper pipe solder
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Product Overview

The Oatey 1.7 oz. Water-Soluble Solder Paste is designed for use in joining or sweating copper pipe and fittings. The lead-free tinning flux will not turn copper piping green. Meets ASTM Standard B-813. Is approved for use by model plumbing codes.
  • Compatible with common plumbing solder alloys
  • Ideal for use with large-diameter copper piping
  • Designed for use in joining of sweating copper pipe and fittings
  • Cleans, fluxes and pre-tins copper piping for uniform solder flow
  • Washes residual flux out of a piping system
  • Meets ASTM standard B-813 and is approved for use by model plumbing codes
  • Lead-free formula is water-based for effective cleaning and will not turn copper piping green
  • Tinning powder helps to pre-tin the piping
  • 1.7 oz. size

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From the Manufacturer

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Container Size (oz.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Color Family
Flux required
Flux Type
Soldering Flux
Maximum Flux Temperature (F)
Solder Type
Soldering Product Type
Tools Product Type
Power Tool

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Customer Reviews

  • 4
    out of 3 reviews
  • 67%recommend this product
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Showing 1-3 of 3 reviews
want job done right
works very good and its safe for copper pipes . I know water will work in pipes and also want it to last . if working on homes copper pipe lines , it the one to use .
  • DIY
  • Verified Purchase
  • Recommended
It made fitting the joints harder
I’m sorry, but I did not like this paste. It goes on well and solders well, but I found that my old paste had a lubricating quality that this does not have. When I cleaned and prepped the pipes, they were harder to fit together after I applied this paste than when they were dry. I completed a dozen joints and couldn’t take it any more – I’m ordering the number 5.
  • DIY
1 found this review helpful
Great quality flux
Originally recommended by a Home Depot associate in store, I have used this solder paste on numerous occasions over the years for sweating residential copper piping. It goes on easy, does not clump, and allows solder to flow beautifully. I just recently completed a residential plumbing project that required over 20 copper piping welds of size 3/4" and 1/2". The flux was very easy to work with. Each and every one of the welds held for a 100% success rate. In addition, this flux is water soluble, so i have no concerns of any resident contamination of the water supply. Highly recommended.
  • DIY
  • Recommended
Showing 1-3 of 3 reviews