Solder - Kester, 60 / 40, 44 Flux, 1 lb spool

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Pictured: 0.031"
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Solder - Kester, 60 / 40, 44 Flux, 1 lb spool

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60/40 Rosin Core, 1 lb Spool, contains lead alloy.

Kester 44 Rosin Flux is an activated rosin formula for use in flux-cored solder wire. Kester 44 Rosin Flux has virtually dominated the field of activated rosin core solders for well over four decades.

An outstanding performance feature of this flux is the “instant-action” wetting behavior. The high mobility and fast-spreading action of this flux results in more reliable production line soldering.


  • Classified as ROM1 per J-STD-004
  • Excellent solderability to a wide variety of metallizations
  • High activity RA formulation
  • Industry standard RA cored wire for decades
Item ID:
Part Numbers
DiameterOur Part NumberUPC/EAN
Product Measurements
AlloySn60 Pb40
Core Type3.3% Flux (66)
Flux DesignatorROM1
Flux Formula44
Flux TypeRosin, Activated (RA)
Melting Range183°C - 190°C
Packaging Information
Packaging Dimensions0.031" version2.5 in. × 2.4 in. × 2.3 in.
0.050" version2.6 in. × 2.3 in. × 2.3 in.
Weight (Packaging)0.031" version1.104 lbs.
0.050" version1.073 lbs.

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Specifications, Files, and Documents

PDF: Specification Sheet Specification Sheet62.56 KB

Questions and Answers

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Asked by Anonymous on April 13th, 2018.
Matt H
April 13th, 2018
This can be used on circuit boards depending on the application.
Asked by Anonymous on January 1st, 2020.
January 2nd, 2020
Staff Member
We only carry one type of flux, and it isn't the flux used in this solder, but you can view it at the following link:

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