The Best Flux For Copper Pipe of 2023

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We ranked and reviewed the top 10 Best Flux For Copper Pipe in 2023. Read more How we ranked

Emily Sloyan
May 30, 2023 2:25 PM

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Rectorseal 74025 12-Ounce C-Flux , Gray

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SCORE
7.6
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Rectorseal

Features

Occupational Health & Safety

Country of Manifacturer: United States

Manufacturer: Rectorseal

PROS

CONS

Kapp Comet Flux for Low Temperature Soldering of Copper, Brass, & Stainless Steel (2 wt.oz)

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SCORE
7.7
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Kapp Alloy & Wire, Inc.

Features

Low temperature soldering flux for Copper, Brass, & Stainless Steel

PROS

CONS

Forney 38060 Solder LF Solid 1/8", 4 oz.,Silver

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SCORE
8.5
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Forney

Features

Strong yet durable construction

Designed for soldering potable water pipe joints

Great for applications that require strength

PROS

CONS

Oatey 30011 Paste Flux, 1.7 oz

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SCORE
9.6
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Item Weight: 2.7 lb

Country of Origin: China

Brand name: Oatey

Item Dimensions: 3.0"L x 3.0"W x 1.0"H

PROS

CONS

Oatay Plumbing Solder Kit, 1/4 lb solder and 1.7 oz flux

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SCORE
9.8
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Copper, bismuth, tin and silver alloy.

1/4 lb solder and 1.7 oz flux

Meets ASTM Standard B-32 and the requirements of the Safe Drinking Water Act.

Formulated for plumbing/potable water line applications.

PROS

CONS

Oatey 30132 Water Soluble Paste Flux, 8-Ounce, Yellow

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SCORE
8.0
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Removes surface oxidation and provides superior wetting properties which allow better solder flow

For use with solid wire solder

Effective on all metals except aluminum and stainless steel

Water flushable

As thick as No. 5 flux

Meets ASTM B-813

Water flushable

As thick as No. 5 flux

Meets ASTM B-813

PROS

CONS

La-Co-22194 WaterSoluble, All Weather Flux, 4 oz

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SCORE
10.0
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
La-Co

Features

Occupational Health & Safety

Country of Manifacturer: United States

Manufacturer: La-Co

Package Dimensions: 2.4" L x 2.4" W x 2.8" H

PROS

CONS

Oatea|#Oatey 53017 1.7 Oz Paste Flux,

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SCORE
7.1
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Effective on all metals except aluminum and stainless Steel

Compatible with all common plumbing solder alloys

Will not turn Copper Piping green

Good for large diameter Copper Piping

PROS

CONS

Oatey Company 30374 1.7 Oz #95 Flux

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SCORE
7.4
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Occupational Health & Safety

Country of Manifacturer: Mexico

Manufacturer: Oatey

Formulated with the same high quality as No. 5. However, patented Oatey silver solder powder is added to pre-tin the copper pipe

Flux can never burn out

100% lead free

Excellent for large diameter copper

Does not turn copper green

PROS

CONS

Oatey 50684 Safe-Flo Silver Plumbing Kit, 8 oz

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SCORE
7.1
KT Score

KT Score is a ranking system developed by our team of experts. It from 0 to 10 are automatically scored by our advanced technological tool based upon the data collected. Our website is an independent organization and has no relation to the manufacturers, so our reviews are completely objective.
Brand
Oatey

Features

Contains 1/4 lb. roll of Oatey Safe-Flo Lead Free Wire solder, 1.7 oz No. 95 Tinning Flux, sandcloth, and application brush

Copper, bismuth, tin and silver alloy solder provides low melt point

420°F - 460°F solder melting range

Tinning flux contains added solder powder for excellent heat transfer

Lead free tinning flux is a smooth, non-runny paste that applies easily and spreads evenly

Tinning flux offers excellent wetting characteristics that facilitate solder flow for exceptional bonding

Abrasive sandcloth is a tough aluminum oxide abrasive that provides fast cleaning and long life

Flux Brush is 5-in long and 1/2-in wide

Copper, bismuth, tin and silver alloy

420°F - 460°F melting range

Meets ASTM Standard B-32 and the requirements of the Safe Drinking Water Act

Formulated for plumbing/potable water line applications

Lead free solder

PROS

CONS

Last update on 2023-05-30 / Prices / Affiliate links / Images, and Product Highlights from Amazon Product Advertising API

Editor's Notes

We ranked and reviewed the top 10 Best Flux For Copper Pipe in 2023. With the support of 43,681 customer's reviews, we hope that this article can give you the most realistic view of these products. The list below contains some main brands as rectorseal, kapp-alloy-and-wire-inc, forney, oatey, la-co.