Apiezon PFPE 501 Vacuum Grease – Ultra High Vacuum & Chemically Inert
PFPE-Based • High Temp Stability • NSF H1 Food-Grade Certified

Description

Apiezon PFPE 501 is a chemically inert, perfluoropolyether-based vacuum grease designed for ultra-high vacuum sealing and demanding chemical environments. With a wide thermal range up to 250 °C and a vapour pressure of just 1.3 x 10⁻¹² Torr at 25 °C, it performs exceptionally well in rotary evaporators, short path systems, and other high-temperature laboratory applications. NSF H1 food-grade certified, it’s safe for use in systems involving incidental food contact and is highly resistant to fluids, acids, and corrosive agents.

Key Features

PFPE-based, chemically inert formulation
Vapour pressure: 1.3 x 10⁻¹² Torr at 25 °C
Operates up to 250 °C
Resistant to fluids, acids, and corrosives
Ideal for ultra-high vacuum systems
Suitable for oxygen-rich environments
NSF H1 food-grade certified

Product Specifications

Grease Type: PFPE (Perfluoropolyether)
Vapour Pressure: 1.3 x 10⁻¹² Torr @ 25 °C
Max Operating Temperature: 250 °C
Chemical Compatibility: Inert to most substances (excluding PFPE-based compounds and Lewis acids)
Application: High-vacuum joint sealing (glassware, distillation equipment)
Certification: NSF H1 Food Grade
Packaging: Tube with screw cap

Typical Applications

Sealing ground glass joints in rotary evaporators and short path distillation
Vacuum systems operating under chemically aggressive conditions
Lab setups requiring non-contaminating, oxygen-compatible lubricants
Food-safe processing and pharmaceutical glassware setups

Notes for Use

Clean all joint surfaces thoroughly using isopropanol before application
Apply a thin layer to the upper third of the male joint only
Insert the joint with a twist to ensure even grease coverage
Do not overapply; excess grease may cause contamination
Remove residue with a lint-free cloth and acetone
Always reseal the tube after use to avoid vapour absorption and performance degradation