2UUL SC95 LQ Wire Liquid Jumper Wire (Conductive Paste)

Some broken traces are too close to heat-sensitive parts, or too fine, to solder a wire to safely. A conductive paste can be laid along the break to bridge it, then left to dry into a solid conductor with no soldering iron involved.

The 2UUL SC95 LQ Wire is a silver conductive paste in a needle-tip tube. According to the listing, it dries in air or can be cured faster with gentle hot air at about 80–100 °C. Once cured, it forms a solid conductive path that sticks to PCB, FPC and metal surfaces.

When it's useful

• Broken traces on a board or flex cable that leave a function dead.

• Damaged FPC connector lines that cause display faults.

• Fine breaks too close to heat-sensitive parts to solder safely.

• Small open circuits on laptop keyboard or touchpad cables.

How to apply

Power the device off and clean the area so it's free of dust, oxide and oil. Squeeze out a thin, continuous line across the break. Let it dry in air, or use low hot air to speed it up, then check continuity with a meter.

Use only a little. Too much paste can bridge to a neighbouring trace and cause a short. Seal the tube after use so the paste doesn't dry out.