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Solar flux SOLAR FLUX-EO-S-008

Recommended method of application
Soldering of solar modules, tabber and stringer material as well as the connecting of cells

No Clean-Flux especially for the solar industry
Di-carboxylic acid complex, halogen-free (WEEE/RoHS compliant)
Type ISO-9454: 2131 (2.1.3.A) // DIN-EN 61190-1-1 (acc. J-STD004B) (IEC ORL0

Cat.-No. 6208
Emil Otto SOLAR FLUX-EO-S-008 No Clean-Flux especially for the solar industry

Technical Data

Appearance/smell: colourless, light yellowish, transparent liquid
Solids content: 2.0 wt.-%
Density at 20 °C: 0.794 (+/- 0.003) g/ml
Acid number: 15 – 18 mg KOH/g
Activators: Di-carboxylic acid complex, halogen-free
Solvents: short-chain alcohols
Flash point: 12 °C


This flux has been specially developed for solar technology, in particular for soldering solar modules, tabber and stringer material as well as connecting cells. EO-S-008 is a No Clean-Flux, halogen-free formulated and optimized for use in wave, selective and manual soldering processes. The Flux was mainly developed for low-melting processes (Bi-solders). EO-S-008 leaves no sticky residue. The activators are specially designed for the higher temperatures that are required in the manufacture of solar modules, without affecting their effectiveness. The application can be carried out by any usual application method (except foams). The solids content is 2.0 wt.-%. EO-S-008 is totally free from corrosion action.

Instructions for use:
Sprayfluxing: If possible, try at first a quantity of 30 – 50 ml/min and observe the distribution of the flux. After that, correct the quantity. Air pressure: 18 –20 l/min.
Preheating: Entering the solder wave, the temperature on the topside of the pasteboards should be 80 – 110 °C, dependent on type of boards, layout etc. In case of using lead-free solders, preheating temperatures of 100 – 125 °C on the topsides are possible.

Safety instructions: Please refer to the current MSDS
This flux is very versatile and OPS-compatible. There are good results for manual, wave and selective soldering, as well as for cable assembly / wire tinning. The general rule of applying fluxes applied in principle as low as possible also applies to this product.

Packaging units

Canister: 5 l, 20 l