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17 Best Flux For Copper Pipe (2023 Updated)

Flux is a substance used to promote the flow of solder on a surface by preventing the formation of an oxide layer. When soldering copper pipe, flux is applied to the joint between the pipe and the fitting to be joined.

The flux prevents the formation of an oxide layer on the surface of the copper, which would otherwise prevent the solder from flowing evenly and creating a strong joint.

17 Best Flux For Copper Pipe

Product Image Product Name Features Price

LA-CO 22107 Regular Soldering Flux Paste 1lbs

  • 475 g

Rectorseal 14010 4 oz Nokorode Regular Paste Flux

  • 4 oz

Kester 186 Rosin Soldering Flux 2oz Bottle RMA No Clean Lead Free

  • High thermal stability for soldering multi-layer assemblies which require higher temperatures
  • High preheat temperatures does not degrade solubility of the residue in normal cleaning solvents

mg Chemicals 835-1L Liquid Rosin Flux

  • 835-1l / 1 L

Harris SSWF1 Stay Silv Brazing Flux 1 lb Jar White

  • 1 lb

mg Chemicals No Clean Flux Paste 10ml

  • Excellent wettability.
  • Non-clean Non-conductive.
  • Non-tacky residue.

Rectorseal 14010 4 oz Nokorode Regular Paste Flux

  • 4 oz

Fry's Metals Powerflow Flux Medium – 100g

  • Ideal to use to install or repair pipework
  • Can be used effectively with both end feed and integral ring solder fittings
  • Good quality product

Markal 22104 Regular Flux Paste – 4 oz.

  • Water-soluble paste won’t leave residue in water piping
  • Meets industry standard ASTM B813 and contains no zinc chloride to reduce corrosion concerns

Oatey Tinning Flux 1.7 Ounce

  • Compatible with all common plumbing solder alloys
  • Will not turn copper piping green
  • Good for large diameter copper piping

Rectorseal Soldering Paste Flux Nokorode – 1 lbs bucket

  • Nokorode Regular Paste Flux is a lead free, all purpose, soft soldering paste flux ideal for use with 95/5 and other common solders.

Oatey 1.7 oz. Lead-Free Tinning Flux

  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family

Oatey 1.7 oz. Lead-Free Tinning Flux

  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family
LA-CO 22107 Regular Soldering Flux Paste 1lbs
  • 475 g
Rectorseal 14010 4 oz Nokorode Regular Paste Flux
  • 4 oz
Kester 186 Rosin Soldering Flux 2oz Bottle RMA No Clean Lead Free
  • High thermal stability for soldering multi-layer assemblies which require higher temperatures
  • High preheat temperatures does not degrade solubility of the residue in normal cleaning solvents
mg Chemicals 835-1L Liquid Rosin Flux
  • 835-1l / 1 L
Harris SSWF1 Stay Silv Brazing Flux 1 lb Jar White
  • 1 lb
mg Chemicals No Clean Flux Paste 10ml
  • Excellent wettability.
  • Non-clean Non-conductive.
  • Non-tacky residue.
Rectorseal 14010 4 oz Nokorode Regular Paste Flux
  • 4 oz
Fry's Metals Powerflow Flux Medium – 100g
  • Ideal to use to install or repair pipework
  • Can be used effectively with both end feed and integral ring solder fittings
  • Good quality product
Markal 22104 Regular Flux Paste – 4 oz.
  • Water-soluble paste won’t leave residue in water piping
  • Meets industry standard ASTM B813 and contains no zinc chloride to reduce corrosion concerns
Oatey Tinning Flux 1.7 Ounce
  • Compatible with all common plumbing solder alloys
  • Will not turn copper piping green
  • Good for large diameter copper piping
Rectorseal Soldering Paste Flux Nokorode – 1 lbs bucket
  • Nokorode Regular Paste Flux is a lead free, all purpose, soft soldering paste flux ideal for use with 95/5 and other common solders.
Oatey 1.7 oz. Lead-Free Tinning Flux
  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family
Oatey 1.7 oz. Lead-Free Tinning Flux
  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family

1. LA-CO 22107 Regular Soldering Flux Paste 1lbs

LA-CO 22107 Regular Soldering Flux Paste 1lbs

  • 475 g

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Amazon.com
eBay
Supply Online
Ferguson

Product Details

Specifications

Details
Flux Form Paste
Flux Type Water-Soluble
Container Size 1 lb

Reviews From Real Customers

Vylan
Whittyone
bart098

2. Rectorseal 14010 4 oz Nokorode Regular Paste Flux

Rectorseal 14010 4 oz Nokorode Regular Paste Flux

  • 4 oz

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Amazon.com – Seller
Walmart
Ace Hardware
Grainger Industrial Supply

Product Details

Specifications

Details
Information Effective Date 04/25/2011
Package Weight .29
Package Weight UOM LB
Net Packaged Quantity 1 EA
Quantity Of Flux 4 fl oz

Reviews From Real Customers

MaxR
snake_pleskin
Dewracng

3. Kester 186 Rosin Soldering Flux 2oz Bottle RMA No Clean Lead Free

Kester 186 Rosin Soldering Flux 2oz Bottle RMA No Clean Lead Free

  • High thermal stability for soldering multi-layer assemblies which require higher temperatures
  • High preheat temperatures does not degrade solubility of the residue in normal cleaning solvents
  • Improves soldering performance
  • 2-Ounce Bottle
  • Eliminates the need and expense of cleaning

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Amazon.com – Seller
eBay – cmlsupply
Walmart – CML Supply LLC
CML Supply

Product Details

Specifications

Details
Package Dimensions 6 x 4 x 4 inches
Is Discontinued By Manufacturer No
Item Package Quantity 1

Reviews From Real Customers

Brett
alphabase2012
philp21

4. mg Chemicals 835-1L Liquid Rosin Flux

mg Chemicals 835-1L Liquid Rosin Flux

  • 835-1l / 1 L

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Amazon.com
eBay – eio-electronicinventoryonline
Walmart – Electronic Inventory Online, Inc.
Techni-Tool

Product Details

Specifications

Details
Mfr. Part # 835-1L
RoHS Compliant RoHS Compliant
Physical State Liquid
Primary Type Flux
Volume 1 L

Reviews From Real Customers

tequipment.net
davidsondude28
jgio45

5. Harris SSWF1 Stay Silv Brazing Flux 1 lb Jar White

Harris SSWF1 Stay Silv Brazing Flux 1 lb Jar White

  • 1 lb

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Amazon.com
eBay
Grainger Industrial Supply
Airgas

Product Details

Specifications

Details
Weight 1.5 lb

Reviews From Real Customers

H.E.D.
R.M.T.
n.

6. mg Chemicals No Clean Flux Paste 10ml

mg Chemicals No Clean Flux Paste 10ml

  • Excellent wettability.
  • Non-clean Non-conductive.
  • Non-tacky residue.
  • Compatible with lead-free and leaded solder systems.
  • Thixotropic paste.

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Amazon.com
Walmart – Electronic Inventory Online, Inc.
Techni-Tool
MTE Solutions

Product Details

Specifications

Details
Manufacturer Lead Time 3 weeks
Alloy SAC305; 96.5% Tin/0.5% Copper/3% Silver
Boiling Point 256 C
Chemical Component Glycol Ether DB/Modified Rosin
Core Flux Core 2.20%

Reviews From Real Customers

Ron A
seamayl
nitrousdigital

7. Kester 951 Soldering Flux 2oz Bottle No Clean Lead Free

Kester 951 Soldering Flux 2oz Bottle No Clean Lead Free

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Amazon.com – Seller
eBay – cmlsupply
Walmart – CML Supply LLC
CML Supply

Product Details

Specifications

Details
Product Dimensions 4 x 2 x 2 inches
Is Discontinued By Manufacturer No
Item Package Quantity 1

Reviews From Real Customers

Travis
debsmoomoos

8. Rectorseal 14010 4 oz Nokorode Regular Paste Flux

Rectorseal 14010 4 oz Nokorode Regular Paste Flux

  • 4 oz

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Sold By Price
Amazon.com – Seller
Walmart
Ace Hardware
Grainger Industrial Supply

Product Details

Specifications

Details
Information Effective Date 04/25/2011
Package Weight .29
Package Weight UOM LB
Net Packaged Quantity 1 EA
Quantity Of Flux 4 fl oz

9. Fry’s Metals Powerflow Flux Medium – 100g

Fry's Metals Powerflow Flux Medium - 100g

  • Ideal to use to install or repair pipework
  • Can be used effectively with both end feed and integral ring solder fittings
  • Good quality product

Check Latest Price

Sold By Price
Amazon
eBay – camdentools
Walmart – CamdenTools
Bonanza – roxy media’s booth

Product Details

Specifications

Details
dimensions 7 x 7 x 5 cm; 59 g

Reviews From Real Customers

Around To
Wasd
Norma Snockurs

10. Markal 22104 Regular Flux Paste – 4 oz.

Markal 22104 Regular Flux Paste - 4 oz.

  • Water-soluble paste won’t leave residue in water piping
  • Meets industry standard ASTM B813 and contains no zinc chloride to reduce corrosion concerns
  • Non-acid, non-toxic, and lead-free to eliminate safety concerns
  • Cleans pipe upon application, allowing solder to run more smoothly around the pipe
  • All-weather formula for use in hot and cold climates

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Amazon
eBay
Tractor Supply Company
Ferguson

Product Details

Specifications

Details
Flux Form Paste
Flux Type Soluble
Container Size 4 oz
Flux Material Stearic Acid
Flux Material 2-Hydroxyethylammonium Chloride

Reviews From Real Customers

Depleted
C F Heating & Plumbing LTD

11. New Oatey 30374 1.7 Ounce Lead Free Tinning Flux,Each

New Oatey 30374 1.7 Ounce Lead Free Tinning Flux,Each

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Amazon
Walmart – Las Terrazas Catering

Product Details

Reviews From Real Customers

Mark Gibson
DL
JBDIM

12. Bernzomatic Plumbing Solder 15 – 3 oz. Silver Bearing , Lead Free

Bernzomatic Plumbing Solder 15 - 3 oz. Silver Bearing , Lead Free

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Amazon
Lowe’s
The BuildClub

Product Details

Specifications

Details
Lead-Free Yes
Application General metal
Gauge (Gauge) 0.118

Reviews From Real Customers

77buzzer
Jays

13. Oatey Tinning Flux 1.7 Ounce

Oatey Tinning Flux 1.7 Ounce

  • Compatible with all common plumbing solder alloys
  • Will not turn copper piping green
  • Good for large diameter copper piping
  • 100% lead-free paste flux cleans and fluxes copper piping
  • Added tinning powder helps to pre-tin piping

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Amazon
eBay
Walmart
Cox Hardware and Lumber

Product Details

Specifications

Details
Appearance Greenish-Gray Paste
Solder Temp. Range 400° F to 700° F

14. Oatey 53068 H-2095 Water Soluble Tinning Flux – Carded 30373

Oatey 53068 H-2095 Water Soluble Tinning Flux - Carded 30373

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Amazon
Frankfort Hardware

Product Details

Specifications

Details
U/M / EA

15. Rectorseal Soldering Paste Flux Nokorode – 1 lbs bucket

Rectorseal Soldering Paste Flux Nokorode - 1 lbs bucket

  • Nokorode Regular Paste Flux is a lead free, all purpose, soft soldering paste flux ideal for use with 95/5 and other common solders.
  • Nokorode special oil base protects the solder joint against corrosive attack.
  • When heated, it reduces surface tension and allows the solder to flow easily and uniformly into the joint.
  • Nokorode Regular Paste Flux works to deliver a strong, leak-free joint.

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Amazon
eBay
Walmart
Ace Hardware

Product Details

Specifications

Details
Excluded Ship States 2 Years
Item is Shipped at this Packaging Level N
Information Effective Date 04/25/2011
Package Weight 1.072
Package Weight UOM LB

16. Oatey 1.7 oz. Lead-Free Tinning Flux

Oatey 1.7 oz. Lead-Free Tinning Flux

  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family
  • Gray Flux required
  • Yes Solder Type

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Lowe’s
Home Depot
Grainger Industrial Supply
Ferguson

Product Details

Specifications

Details
Number in Package 1 pc
Container Size 1.7 oz.
Lead-Free Yes
Product Type Tinning Flux
Number in Package 1 pc.

17. Oatey 1.7 oz. Lead-Free Tinning Flux

Oatey 1.7 oz. Lead-Free Tinning Flux

  • 120 Soldering Item Type
  • Solder Tools Item Type
  • Force Tool Color Family
  • Gray Flux required
  • Yes Solder Type

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Sold By Price
Lowe’s
Home Depot
Grainger Industrial Supply
Ferguson

Product Details

Specifications

Details
Number in Package 1 pc
Container Size 1.7 oz.
Lead-Free Yes
Product Type Tinning Flux
Number in Package 1 pc.

Conclusion

The conclusion of the flux for copper pipe is that it is an effective way to connect two pieces of copper pipe together. The flux is a material that helps to create a strong bond between the two pieces of copper pipe.

It is important to follow the directions on the package when using the flux.

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