General thermal paste, chosen as probably has no conductive or corrosive properties.
This one is adequate for computers of daily use/ even minor OC.
Go for a higher tire product if Doing extreme OC or something, as Shaun Sebastian mentioned it degrades ( still probably not that much as he has shown, probably other variables were in working.)
For spreading just use a cotton swab/ toothpick/ backside of a matchstick. or simply use the finger (keep in mind don't contaminate the components/contacts with that finger).
**before putting on the processor try somewhere else at least a bit, otherwise, if the piston were stuck an unnecessary heavy push might ruin your motherboard...don't put too much. that tube has enough for 5 to 8 applications.
Such a good price was provided by M.D. love u guys.