High Vacuum Diffusion Pump Oil

ECO offers a full line of synthetic, silicone-based diffusion pump oils manufactured specifically for ultimate vacuum performance. Our unique formula offers unmatched low vapor pressure, oxidation & radiation resistance, and heat stability. It's your perfect replacement for the discontinued DC-702, DC-704, and DC-705.

As a manufacturer, we're offering you the highest quality silicone oil at near wholesale prices. Learn more or make a purchase directly on our Silicone Diffusion Pump Oil website.

If you have any questions or would like to get a sample of our diffusion pump oil, please contact us at support@diffusionpumpoil.com.

Additionally, if you'd like to recycle your used silicone-based diffusion pump oil, we offer a perfect solution.


We offer silicone diffusion pump oil in a variety of packages including 250ml, 500ml, 1L, 1 Gallon, 5L, as well as custom qualities based on your request. We offer bulk discounts for large quantities, please speak with a representative.