Features for P19: 1) Solid content: 19% 2) Density: 0.79 3) Color: black 4) Flash point: +10 - +50¡ãF, -12 - +10¡ãC 5) Viscosity (time for flow over 4mm nozzle): 10 to 20 seconds Features for P27: 1) Solid content: 27% 2) Density: 0.81 3) Color: black 4) Flash point: +10 - +50¡ãF, -12 - +10¡ãC 5) Viscosity (time for flow over 4mm nozzle): 15 to 30 seconds