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Water-based flux EO-G-005 (multiflux)

Recommended method of application
Wave soldering (spray fluxing), hand and selective soldering

No Clean-Flux, water-based
Di-carboxylic acids, VOC-free (WEEE/RoHS compliant)
Type ISO-9454: 2131 \ DIN EN 61190-1-1 (acc. J-STD004) (IEC ORM1)

Cat.-No. 6091

Technical Data

Appearance: transparent, clear liquid
Hazardous goods: No
VOC: 0.0 %
Solids content: 4.0 wt.-%
Acid number: 28 – 35 mg KOH/g
Halogen-free: No
Resiny: No
Activators: di-carboxylic acids, VOC-free
Solvents: water-based
Flash point: non-flammable
Available as concentrate: No
Durability: 12 months


EO-G-005 was developed for use on wave soldering machines and has a relatively high activity despite the low solids content of only approx. 4 wt.%. The flux is applied by means of a spray fluxer; under certain circumstances, the flux can also be applied via brush fluxers.
It is recommended to test assemblies soldered with water-based fluxes, which are subsequently painted or encapsulated, for compatibility of the coating media with the flux residues beforehand. In addition to the suitability test according to DIN 61190-1-1, the flux also passes our internal “EO in-house standard EO-STV-2016-02-01, which is based on the rapid test procedure for selective, immersion and manual soldering fluxes according to Fraunhofer (ZVE). This means that the flux residues of the EO-G-005 after selective soldering can be assessed as significantly less critical and non-corrosive than those of conventional fluxes for wave soldering.

Recommendations for processing:
Foam fluxes: Not recommended
Spray fluxing: If dosing is possible, first adjust the flux quantity to 10 – 20 ml/min, observe the even flux distribution on the PCB (test with thermal paper if necessary) and then correct to the optimum quantity.
Preheating: For “simple” PCBs a preheating temperature of 80 – 110 °C is recommended, for “more complex” PCBs 110 – 130 °C on the top side of the PCB. It can be used in both leaded and lead-free solder systems.

Customer added value

  • Non-flammable (no legal restrictions for transport, storage and handling)
  • Very good soldering properties (capillarity, wetting)
  • Broad process window (high thermal stability, good activity over a long interval)
  • Very good residue behaviour (optically very clean, high SIR)

Packaging units

Canister: 5 l, 20 l