Hetman Synthetic Rotor Lubricants ensure long-lasting rotary valve performance. These lubricants will protect rotors and valve casings against corrosion and wear while improving valve seal. Hetman Synthetic Rotor Lubricants will not swell rubber bumpers or damage plastic components. Non-toxic, non-gumming viscosity grades, designed for instruments with rotors having average clearance with a child-resistant dropper.