Otto's Original - Quality products since 1901


No clean, alcohol-water based flux, di-carboxylic acids, resin free,
halogen-free (WEEE/RoHS conformant)
Type 2131 // ORL0 acc. ISO 9454 // DIN EN 61 190-1-1

Packaging units:
20 l
Granulate for 10 l
Application area: Wave- and selective soldering
Appearance/smell: clear, colourless to light yellow
Solids content: 3.5–3.7 Gew.-% (wt.-%)
Density at 20 °C: 0.9–1.0 g/ml
Acid number: 28–32 mg KOH/g
Activators: di-carboxylic acids
Solvents: short-chain alcohols and water
Flash point: not easily flammable °C
Durability: 24 months
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The hybrid EO-Y-004 flux was developed to be used in wave and selective soldering. It exhibits a solids content of 3.5% to 3.7%. It  has been developed for a very broad range of applications. The soldering properties are very good, particularly with rise-through and circuit-board wetting. The processing window is very broad with great thermal stability. Practice has shown that with proper application, no washing of circuit boards soldered with this flux is needed. The circuit boards are visually clean. The flux is available as a ready-to-use-mix or in a granulate-based concentrate.

Customer added value:

  • Very good soldering properties (capillarity, wetting)
  • Available as concentrate (granulate)
  • Broad process window (high thermal stability, good activity over a long interval)
  • Very good residue behaviour (optically very clean, high SIR)

Questions about our products?
We will advise you by phone 06123 / 7046-0.