It's strongly recommended that after cleansing your weapon parts in an ultrasonic solution you run it again in a lubricating solution to drive out any water and to protect the metal against rust. The ones I saw cost up to $80 a gallon so I reversed engineered one brand an came up with a simple substitute that has served me well. Like the commercial version, it is strongly recommended you run it outside since excellent ventilation is very important. Also, do not heat the product at all! It get hotter as it is run in the ultrasound.
Ultrasonic Lubricant
Amount Common Name
1 gal(-8 fl oz) Odorless Mineral Spirits or K1 kerosene
1-2 fl oz PDMS - Dimethicone Liquid Silicone Oil
5 to 8 fl oz Mineral Oil