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Apiezon PFPE 501 Vacuum Grease

In stock
Excl. Tax: £145.83 £175.00

Apiezon PFPE 501 vacuum grease operates well at low to high temperatures (250 degrees celcius). The vapour operating pressure of 1.3 x 10-12 at 25°C. Apiezon PFPE 501 is Chemically Inert and is a robust and versatile sealing lubricant that seals well under the most extreme and challenging conditions including instances when aggressive chemicals are being used.

Apiezon PFPE 501 is perfluoropolyether-based grease and has an extremely high resistance to all solvents, acids and corrosive substances apart from PFPE based substances and Lewis Acid catalysts.

This food grade NSHF H1 certified Grease is perfect for the use in sealing glass joints on Rotary evaporator and Short path distillation equipment where temps can get to over 100 degrees C.


Why Use Apiezon PFPE 501 Grease?

· PFPE based

· High temperature lubricant

· Used in oxygen rich environments

· Ultra high vacuum

· Chemically inert

· Extreme pressure

· Wide temperature range


How to Use

Ensure that all contaminants are removed from the joints of the glass you are sealing, we recommend our “Isopropanol Liquid Solution”

Smear a thin amount of grease to the top edge of the male joint this should make up 1/3rd of the joint. Please note that using to much grease or applying the grease to low down the male joint may end up in contamination.

Once the user is happy please insert the male joint with a twist action to seat the piece firmly in place. The user should double check there are no cracks in the internal coverage of the joint. Please note that if there are any cracks gently twist the piece in the joint which should result in the cracks disappearing.

Removing and Cleaning

Using a lint free cloth remove all excess grease, once this is done, we advise to use acetone which will clean the joint perfectly.


It's is very important that the lid is screwed back on the tube each time it’s been used as PFPE 501 will absorb airborne vapours particularly water and hydrocarbons which will lead to the grease losing its vapour pressure