TEMPORARY Thermal Compound Replacement : Mayonnaise

Sounds too good to be true, but here goes :

http://www.hardwaresecrets.com/article/Thermal-Compound-Roundup-October-2011/1396

They too aren't sure if it can be a permanent replacement.

Quoting the conclusions page :

"Conclusions
The big surprise of this month was the performance of the mayonnaise as a thermal compound. It worked superbly, showing better performance than some well-known high-performance thermal greases. Again, we cannot determine how long it should remain effective, but in the short term, mayonnaise was the best alternative thermal compound we have seen so far. "