Synthetic heat transfer fluid with a very high thermal stability designed to operate in a flowing circuit, at up to 340°C, without the formation of deposits resulting from thermal degradation. It must not come in contact with dehydrogenation catalysts at high temperatures. THERM SY 20 must flow at a speed of at least 1 metre per second. THERM SY 20, like any heat transfer fluid, must be covered with a layer of nitrogen, in an expansion tank if its temperature is higher than 80°C.
Semi-synthetic oil particularly recommended for lubricating the gearboxes of 2-stroke and 4-stroke motorcycles.