... be repeated to add 3 Flux stop evaporation, keeping Kester 951 Flux Pen/Soldering Pen Superior fluxing ability Instant wetting ... 951 flux pen Feature: This is Kester Rosin Pen Designs for ... non-corrosive, non-conductive, moisture resistant, and fungus resistantNote : Kester 951 is flammable. Store away from sources of ignition. Shelf life ...