Otto's Original - Quality products since 1901


Cat. no. 4638 (#2963, #3967, #3968)
Selective and manual soldering processes with halogen-free actuators ISO-9454: 2131
DIN-EN 61190-1-1 (acc. to J-STD004): L0 (IEC OR/L0)
WEEE / RoHS - compliant

Packaging units:
8 ml
50 ml
5-30 l
Application area: Selective soldering, manual soldering
Appearance/smell: colourless to light yellow liquid
Solids content: 3,9 – 4,1 Gew.-% (wt.-%)
Density at 20 °C: 0,797 (+/- 0,003) g/ml
Acid number: 30 - 36 mg KOH/g
Activators: activator system of WB-30... (and variants), (di-)carboxylic acid complex
Solvents: Mixture of monohydric alcohols
Flash point: 12 °C


This flux was developed for selective and manual soldering processes as well as cable assembly.

EO-RF-WB30 contains the activator system from our proven water-based flux: WB-30… “System” (and other variants).
The application is done by the special EO-FLUX-DOSAGE-BOTTLE, but can also be done by all usual application methods (except foaming). The solid content is 4 % by weight.


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