• Applicator: Syringe
• Formulation: Rosin (CAS 8050-09-7), proprietary ingredients
• Use: Precision electrical soldering
• Notes: Precision soldering of electrical connections for non-clean applications. Use Soldering Flux, TYPE RSF-R80 for general soldering.
• RSF-R39 Rosin No Clean Flux is a mildly-activated rosin flux that is considerably more active than water-white rosin

• RSF-R39 Rosin No Clean Flux is a mildly activated rosin flux that is considerably more active than water-white rosin.
• Recommended for electrical and electronic soldering applications - excellent for P.C.B repair and rework
• Can be safely left on the circuit board after reflow without cleaning.
• No refrigeration necessary
• Made in USA

The active ingredients in RSF-R39 are non-ionic and non-conductive even in the presence of moisture. Like rosin, it becomes active only at elevated temperatures, reverting to an inactive state at room temperature. It is recommended for all applications where post-soldering cleaning is not feasible, and the residue must be highly insulating.

• Appearance: Smooth and tacky amber paste
• Viscosity (Malcom): Typically 200 – 280 at 5 rpm @ 25°C
• Tack strength (per IPC J-STD-004):
• Initial TBD 6 hr @ 50%RH TBD 24 hr @ 50%RH TBD Fineness of Grind < 10 micrometer Acid
• Number (mg KOH/g) 90-110
• Halide content ROL0, per IPC J-STD-004, Halide free
• Halogen content None intentionally added
• I PC SIR J-STD-004B Pass
• Bellcore SIR (pass > 1011) Pass, 8.9X109, Ohms at 96 hours 2.2X1010 at 500 hours Pass/Fail = final > initial/10)
• Shelf life of unopened containers is nominally 12 months. If the material has been chilled, the container should be allowed to reach room
• Nonflammable, noncorrosive.