Kester “331” Organic Water-Soluble flux is more effective than rosin flux when working with difficult-to-solder metals. Organic flux is more heat stable than most organic fluxes and the residue can be completely removed with a simple water rinse

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Sn63 Pb37 ( 63-37 ) #331 Product Performance
• Excellent solderability for a wide variety of metallization processes
• Easy residue removal with softened tap water or deionized water (recommended)
• Neutralizers, saponifiers or detergents are not necessary for residue removal.
• Produces a minimal amount of smoke and odor
• Residue is conductive and may cause corrosion of metal parts over time.

• Compatible Metals: Platinum, gold, copper, tin, solder, silver, nickel, cadmium, brass, lead, bronze, rhodium, beryllium copper, palladium, immersion tin, immersion silver, nickel-iron and Kovar.

Kester 24-6337-6422 Specifications
• Wire Diameter, .015″/ 0.40mm / 28 AWG
• Spool Size: 1 lb.
• Alloy: Sn63 / Pb37 ( 63% tin – 37% lead )
• Melting point: 361º F ( 183º C )
• Core Flux: Organic Water-Soluble
• Core Size: regular 3.3% flux by volume ( 66)
• Case qty: 25 lbs.
• RoHS Compliant: No
• Classified as ORH1 per J-STD-006C

Fluxes: If needed, Kester 2331-ZX organic flux may be used to aid in the reworking of soldered joints. Flux is available in gallon, 5-gallon or flux pen sizes for optimum board cleanliness.