The RMA-223 10 ml Solder Flux is a high‑performance, rosin‑mildly‑activated (RMA) chemical bonding aid that eliminates oxidation‑induced “cold joints” and brittle connections. As soon as the soldering iron touches the surface, the flux cleans and prepares the metal, delivering perfectly wetted, professional‑grade joints every time.

Key Features

• Halogen‑Free Formulation – non‑corrosive, leaves a clear, high‑resistance residue that usually requires no post‑solder cleaning.


• Reduces Heat Damage – faster solder flow means less time heating pads, protecting delicate microelectronics and copper traces.


• Versatile Compatibility – works with both leaded (Sn63/Pb37) and lead‑free solder alloys.


• Precision Syringe Dispenser – 10 cc (10 ml) industrial syringe delivers a microscopic bead or single drop exactly where needed, eliminating mess and waste.

Technical Specifications

• Model: RMA-223


• Volume: 10 ml / 10 cc


• Type: Rosin Mildly Activated (RMA) paste/liquid flux


• Viscosity: High (gel‑like consistency that stays exactly where applied)


• Packaging: Plastic syringe dispenser

Ideal Applications

• BGA and SMD Rework – perfect companion for hot‑air rework stations when replacing microscopic resistors, capacitors, and microcontrollers.


• Custom PCB Assembly – enables drag‑soldering of large, multi‑pin chips on freshly etched or CNC‑milled prototype boards.


• Wire Tinning – dip stranded wire into flux before soldering for deep wicking and bullet‑proof mechanical connections.


• Electronics Repair – restores cracked or oxidized joints on vintage audio gear, game consoles, laptops, and other equipment.