Residue: No-clean with QCAid™

No-clean tacky fluxes can be left on PCBs for multiple assemblies, evaporated by hot air, or removed using foam swab and Isopropanol. Commercial cleaning can be achieved using solvents in ultra-sonic devices.


  • Cleaning is recommended on all fluxes at all time and not just for cosmetic reasons - unactivated residue may absorb moisture from the air subsequently causing corrosion, also excessive residue may cause voltage leakage negatively affecting PCB performance.
  • Do not dilute the flux or tamper with it in any way.
  • Do not expose flux to water - fluxes are hydrophobic, water will destroy the flux.

Meet Hydra which can be cleaned using chemical solvents or deionized water. DI-water is the most economical, highly efficient and eco-friendly solvent on Earth. Continue using Hydra with solvents and switch to DI-water at any time - Hydra enables the switch.

We recommend QCAid™ uplifted modern fluxes - containing optical tracer exposing contaminated areas in UV/blacklight. QCAid - Everyone can QC!™