Based on My knowledge of Aerogel and the Specifications of their different Materials I believe the basic Cryogel ( Not the Z ) would be the best material of them all.
My reasoning - it is the Lightest of all their materials at 8 Lbs/ Cubic Foot.
Also if you look at Cryogels recovery after compression
it has the highest load capacity at 250 PSI.
Between these two characteristics - Best Compression
Recovery and Lightest Weight - and at the relatively low temperatures we are speaking of - Neither Super Hot or Cold - I think Cryogel is the Call.
One of the reasons that Aerogels are so effective is that they are mostly air. The best Experimental Aerogels - at insulating - are nearly if not lighter than air. The Materials in discussion are what is commercially available (and at a reasonable price
) at this time but don't really meet the full promise of what these types of materials may provide or show promise of in the future. Although the truly exotic stuff is available at exorbitant cost and not practical - or available to the average Joe - at this time.
My Two Cents. Ultimately this is a simple observation on my part and if you could actually get a real product engineer
( Not a Salesman or as they are referred to, a Sales Engineer
) on the phone
from Aspen Aerogels then I am sure they would be the best source for your answer.
Number is 508.691.1111