The mineral oils Invoil, Invoil 20, Invoil 30, Invoil 46 are extracted from petroleum and distilled twice.

Invoil : specially distilled for use in diffusion pumps where pressure of 10-7 mbar is required. It is a standard fluid for mass spectrometers, leak detectors,distillation systems, and electron microscopes.

Invoil 20 : high quality, general purpose hydrocarbon diffusion pump fluid that works well in any diffusion pump. The fluid is designed to meet the vapor pressure requirements of a diffusion pump while exhibiting excellent thermal stability. Invoil 20 can also be used in a mechanical pump.

Invoil 30 : specially developed diffusion pump fluid which is double distilled. This hydrocarbon is modified for high temperature use with a strong antioxidant. Invoil 30 can be used in applications such as metallizing, optical and microelectric coatings, sputtering, and metallurgy.

Invoil 46 : synthetic (arylalkyldiphenylether) diffusion pump fluid whose performance combines the best properties of silicones and polyphenyl ethers. It was developed to accommodate the performance requirements of such applications such as CRT evacuation, optical coatings, evaporation and sputtering, vacuum metallurgy, leak detection, and mass spectrometry.