• Cleaning of flux residues

  • Special applications

  • Selective soldering

  • Cable assembling/Wire soldering

  • Manual assembling

  • Wave soldering: foam fluxing

  • Wave soldering: spray fluxing
Water- and alcohol-based flux
Flux for cable assembling
Cleaning agents
Otto's Original - Quality products since 1901


EO-Flux Pen FA-4004

Low-solid flux specially developed for selective soldering processes without halogenated activators
Type 2.2.3.A according to ISO 9454
Packing Units:
Plastic sleeve with pressure metering system with 8 ml volume, available in PE-pouch of 10 pcs. (minimum purchase)
Appearance: Colorless, yellowish colored, clear fluid
Solids content:3.5%
Density at 20 °C: 0.797 (± 0.003) g/mL
Acid number: 24 mg – 27 mg KOH/g
Activators:Dicarboxylic acids
Solvents:Alcohol mixture
Flash Point:12° C

Customer added value

  • Good wetting and evaporation
  • Good soldering properties
  • Broad process window
  • Transport- and storage-safe even in winter
  • Test under ‘house standard’ passed, thus low risk of flux residues
  • Broad application possibilities
  • Easy handling
  • No spilling and dripping of the flux while using
  • Fast and cost-efficient rework
  • Flux with low solids content

The EO Flux-Pen allows spot-on application of flux on PCBs. EO Flux-Pen consists of a cartouche- a special pressure dosing system with felt tip and a closing cap. The flux is kept in the cartouche and is applied with the felt tip. The special pressure dosing system allows thorough, pointed flux-application.

This low-solid flux has been developed specially for wave- and selective-soldering processes. The EO-Flux Pen FA-4004 can be applied via dip, stamp, or drop-jet application. Despite the low solid content of 3.5%, adequate activity is achieved, even for lead-free solders. Furthermore, the EO-Flux Pen FA-4004 contains a corrosion inhibitor.

Product overview

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