Kester 44 Rosin Flux is an activated rosin formula for use in flux-cored solder wire. 44 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. 44 is classified as ROM1 per J-STD-004.

Performance Characteristics:

• High activity RA formulation
• Excellent solderability to a wide range of metals
• Industry standard RA cored wire for decades
• Classified as ROM1 per J-STD-004