I´ve bought 1 gram of Thermal Grizzly conductonaut but now i dont know if it is compatible with the Intel heat spreader. The thermal compound is not compatible with aluminium because it contains germanium.
Thank you for contacting Intel Communities.
In this case, there isn't any report about compatibility issues with this thermal compound, in fact, I found https://www.amazon.com/Thermal-Grizzly-Conductonaut-Grease-Paste/product-reviews/B01A9KIGSI/ref=cm_c... several reviews in Amazon.com regarding this and the Intel® Core™ i7-7700K Processor.
I wouldn't worry about using this thermal compound with the CPU in question.
I hope this information helps.
Please don't hesitate in replying to this post if you need further assistance.