Apiezon Wax W can be used either as a vacuum sealing compound or as a mounting wax. For work with high vacuum and UHV, it would be better to use Vacseal® Vacuum Leak Sealant.
There are a series of three different Apiezon Wax products, differing in their "hardness". Be sure to be familiar with the differences in the characteristics of the different waxes.
