There are choices for adhesives that will support the outgassing requirements. Merco in NJ does a nice job. Personally I found the Uralane to be the best fit for my application. The "pink" 7762 has ceramic spheres of .004 to ensure passives are not flat on land. The "beige" 7760 is for leaded and mechanical parts (no particles). They are both one part frozen and very safe to use. Most importantly is they have heritage in Space applications. Coretec Brad 781 858 0783