Solder Paste No Clean Lead-Free in 15g/5cc Syringe This is a No-Clean formula solder paste flux. It comes in a 15 gram/5 cc syringe with plunger and nozzle. It’s easy to dispense and great for soldering, desoldering, and rework. Has a shelf life of a little over 2 months if left unrefrigerated and a little over 6 months if refrigerated. 24 Hour Emergency Contact Information: Chemtrec (U.S.): (800)424-9300 Canutec (Can): (613)996-6666. Made in China.