All coolers come with pre-applied thermal paste of some sort, or a small tube filled with such a compound, but they aren't really above 'decent' in the eyes of enthusiasts and/or overclockers.
Fortunately, cooling product makers have special thermal compounds up for sale, such as the GC-Extreme.
GELID is the one offering it for $25.99 / 19.99 Euro, where “it” is a 10-gram jar of sorts (only 3.5g tubes have existed before), filled with a non-electrical conductive, non-corrosive, non-bleeding and non-curing paste.
What's more, in addition to the “GC-Extreme 10g”, GELID has prepared “GC-Supreme”, made of “the purest thermal conducting materials” and possessing a “nano scale produced ultra-fine molecular structure.”
The price of “GC-Supreme” is $7.2 / 5.7. Euro. Both products come with the GELID applicator (a small palette knife of sorts).