thermoplastic polyurethane modeling compound from Exact Plastics
sold by Atlas International for last casting
Compare Thermo-Blue.
video demonstration casting into a foot impression
The 160 in its name seems to refer to the upper limits of its melting temperature range in degrees Celsius:
Material bei 140-160°C in einem geeigneten Gefäß auf einer Heizplatte oder im Umluftofen aufschmelzen.
Melt the material at 140-160°C in a suitable container on a hotplate or in a convection oven.