Right... after multiple failures with getting a good spread (tried increasing quantities of product, mounting the block (Apogee XT) in different ways), it just wouldnt spread well. So I tried to spread it with a CC... that failed even worse. It turns out that copious amounts of this product (literally pea sized, not rice - as the instructions stated) were needed with my setup
to achieve adequate coverage.
I dont have this issue with MX-2/4, AS5 and the temperature difference wasnt that great.
Single case though, I would imagine the problem is with the mounting pressure being limited on the Apogee XT setup vs others that are not? No clue.