Foam-making liquid Bio FluoPro, 3E - 20 litres in tank- Appearance brown liquid- Specific gravity at 20°C 1.03 ± 0.02 Kg/dm3- pH at 20°C 7.0 ± 1.0- Viscosity at 20°C 4 ± 2 cStokes- Sediments < 0.25 %- Surface tension at 3 % 25 ± 2 mN/m- Freezing point - 6°C- Temperature of use 0°C / + 50°C- FOAM QUALITY AT 3 %, Low Expansion > 7* and drainage time 25 % > 2 minutes