Apiezon® Q is a versatile sealing compound with putty-like properties, and it serves a variety of purposes throughout several industries. It has two unique properties, at room temperature it holds firm to remain stationary in position, yet is a soft material so it can be molded by hand. Apiezon® Q creates an effective, temporary vacuum seal if a leak persists in a vacuum system, thus reducing equipment down time. Apiezon® Q can be used as a sealant around edges of flat, unground joints to blank off parts of an apparatus, or sealing glass cylinders to metal plates to produce a vacuum seal. When kneading or rolling Apiezon® Q sealing compound by hand, it is important to ensure cleanliness of product to preserve the vapor pressure characteristics.
Malleable - can be shaped into an "o-ring" to seal between two flat surfaces
Use to seal joints and fill holes or gaps on the rotary pump side of both glass and metal vacuum systems
Easy to use and versatile
Apiezon® Q sealing compound will adhere to a wide array of surfaces including: glass, metal, plastic, and several more. With these strong adhesion properties, Apiezon® Q sealing compound is still easily removed by peeling away from the site of application. If traces of product are left, they can be removed with wash of any hydrocarbon solvent or with use of a vapor degreasing bath.
Vapor Pressure (Torr)
@20°C: 1 x 10-4
-10 - 30 (°C)
Approx. Softening Point
Temp. for Application
Apiezon® Q sealing compound offers vacuum properties in the low vacuum range, with a vapor pressure of 10-4 torr at ambient temperatures.
Apiezon Compound Q Vapour Pressure
Chart:Apiezon Compound Q Vapour Pressure
It is strongly recommend using all fluids and greases at the time of receipt, however when storage is necessary, rotate older stock into use first and observe the recommended parameters listed below.
All Apiezon products have a shelf life of 10 years if unopened in their original container and stored at ambient temperatures. If the product has been opened, resealed and then stored in clean, dry, dark environment under ambient conditions in the original container, it should last up to 10 years, but this is not guaranteed.