[ Ref. 131228 MMD, RTV Coating for Protecting Leather and Pouches ]

In my posting about pouch coatings, I should have made clear that
Mr. Pebworth does not use 111, but one of the many other Dow coatings.
Below is a link to the data sheet for Dow 111 (trade name "Molykote").
Note that it is specifically designed as a "sealant for vacuum and
pressure systems."  I have used it for years with excellent results.

  http://www.dowcorning.com/DataFiles/090007c8802e1201.pdf 

Tim Gautreaux