Soldering Flux Tack Flux 2cc Chip Quik products use synthetic no clean flux, providing exceptional shelf life compared to natural rosin fluxes. Flux Shelf Life: refrigerated &gt;24 months, unrefrigerated &gt;24 months Refrigerate at 3-8C (37-46F) Allow 4 hours for solder paste to reach an operating temperature of 20-25C (68-77F) before use Package of 6 tubes, 2cc each