AMTECH 4300/LF-4300-TF is a universal water washable L0 tacky solder flux suitable for both leaf-free and tin-lead applications, just change the wire. Formulated for syringe, stencil printing, and rework on all PCB surface finishes, can be used for BGA sphere attachment and reballing, also designed to work on all flip chip bumping and chip scale packaging sites.
Storage and Handling
Tacky flux should be stored at room temperature (20-25 °C). Syringes and cartridges should be stored vertically with the dispensing tip down. Properly stored tacky flux has a 12 month shelf life.