Ichor Gel

XT 32 Series model Xu standing in an orbital android maintenance bay, with Ichor Gel injection tubes shown being connected to her lower arms. During maintenance, similar tubes are also used to pump out old Ichor Gel for repair

Ichor Gel is a synthetic blood-like material used in all modern androids and some robots, with most most of the former relying on it to function. The gel is multi-purpose, and is designed primarily to be housed within synthetic skeletons and muscle systems; It is electrically conductive, acts as a muscle and joint lubricant, contains colonies of self-repair nanobots, and regulates temperature (which typically involves cooling).

Ichor Gel is fluorescent yellow and translucent in appearance, becoming completely transparent when spread thinner than a few millimetres, and has a highly slippery, petrol-like consistency.