Apiezon waxes are designed for sealing joins of a permanent nature.  Three grades of wax are available, all similar, but with differing degrees of hardness and softening points.  Wax W is used in most applications, but a softer wax is used where it would simplify application or where there may be vibration problems.

Apiezon Wax W

Wax W is a general purpose wax with the highest melting point of the three Apiezon waxes.  Wax W softens between 80ºC and 90ºC and is suitable for sealing joints that may become warm during operation.  Wax W should be heated to about 100ºC for ease of application.

Apiezon Wax W100

Softer than Wax W, this product softens between 50 and 60ºC.  It is used where a wax seal is needed, but there is possibility of a joint cracking due to vibration.   Wax 100 should not be used above temperatures of 50ºC.

Apiezon Wax W40

The softest wax, Wax W40 is designed for use where it is required so have the sealing medium flow into or around a joint, but at the same time the temperature of the joint must be kept as low as possible. Occasions for use of such wax arise where the glass of the apparatus may crack if heated.  Wax W40 is designed to flow at temperatures of 50-60ºC; it cannot be used for apparatus likely to heat above 30ºC.
 

Apiezon Sealing Compound Q

Apiezon Sealing Compound  is a putty-like substance used to seal joints and fill holes and gaps on the rotary side of a high vacuum system.  It is suitable for sealing the edges of flat, underground joint in test equipment where parts of the system must be blanked off temporarily.  A further example is the sealing of glass jars to metal plates to produce temporary vacuum enclosures.