Solder - Kester, 60 / 40, 44 Flux, 66 Core, .031 Dia, .5 oz

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Solder - Kester, 60 / 40, 44 Flux, 66 Core, .031 Dia, .5 oz

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Kester 44 ~\frac{60}{40}~ rosin core type. .031" diameter, 0.5 oz

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:
Product Measurements by Type
AlloySn60 Pb40
Core Type3.3% Flux (66)
Diameter0.031 in.
Flux DesignatorROM1
Flux Formula44
Flux TypeRosin, Activated (RA)
Melting Range183°C - 190°C
Packaging Information
Packaging Dimensions0.52 in. × 0.52 in. × 4.3 in.
Weight (Packaging)0.0375 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 June 1st, 2018.
Matt H
June 1st, 2018
This solder has a diameter of .031" .

Product Reviews

5.00 out of 5 based on 1 reviews
Patrick Young - May 23rd, 2021
5 out of 5

Solder I use for all my electronics.