3.5g last me about 2 yr...thats about 10 hsf upgrades/reinstalls, oh and add in my northbridge thats another 5, cant forget VGA hsf throw in another 3-4 applications, and I used the last on my vRam heatsinks (works better than thermal tape imo)
So about 19 applications for me...and I had a concave cpu ihs which required more AS5.
note: store AS5 vertically, its a liquid, so all the silver particals will flow to the bottom.