KESTER 951 Soldering Flux

KESTER 951 is a zero-halogen, non-rosin flux engineered for high-reliability soldering processes, including wave soldering and for use on conventional and surface mount circuit board assemblies. Its extremely low solids content (2.0%) and unique activator system ensure practically no residue is left on the assembly after soldering. Boards exit the wave solder machine dry and cosmetically clean. This "no-clean" formulation eliminates residues that could interfere with electrical testing.

KESTER 951 is suitable for applications requiring maximum reliability, such as in the automotive, computer, and telecommunications industries. 951 delivers improved soldering performance, helping to minimize common defects like solder bridges (shorts) and excessive solder. It also provides superior surface insulation resistance (SIR) on soldered boards compared to typical water-soluble fluxes. Additionally, 951 contains a corrosion inhibitor to prevent the formation of corrosion products, even when bare copper surfaces are exposed to humid environments

Product Key Features

• Residue-free boards do not interfere with electrical testing and exhibit high Surface Insulation Resistance (SIR).
• Improves soldering performance to reduce solder bridges (shorts) and excessive solder.
• Contains an inhibitor that prevents corrosion on exposed bare copper surfaces in humid conditions.

Applications

• Ideal for applications requiring high reliability, such as automotive, computer, and telecommunications circuit board assemblies.