I have a situation where  concern has been raised that shipment of a conductive  adhesive in dry ice has caused abnormal adhesive performance (Voiding/outgassing) during cure. 
To my recollection,  it was thought to be a best practice to ship under-fills, glob tops, etc. in a foil bag when using dry ice due to similar issues/concerns. Thought was that CO2  could penetrate common plastic bags but not foil  (heat seal) bags. 

I would appreciate any and all thoughts/experiences on this matter.
Both supporting or disputing this line of thinking. 

Many thanks in advance. 

Rich  Kraszewski 
Plexus - Senior Staff Process Engineer
Phone: (920) 969-6075