MONOETHYLENE GLYCOL 100%. propylene glycol 100%. you can be also interested in below solution to make your own coolant/ antifreeze.
TRZ 4-in-1 Antifreeze Refractometer Ethylene Glycol, Propylene Glycol black
TRZ 4in1 Antifreeze Refractometer Ethylene Glycol, Propylene Glycol in Antifr...
12x qt Coolant Motorcycle/ATV Blue Ethylene Glycol 50/50 -1 Case Honda OEM #C296