I have had this tube of MX4 since 2013, it’s served me well, countless rebuilds of my computers, CPUs and GPUs alike, home servers, gaming computers, laptops, games consoles, pi4, I used this on everything. You served me well.
8th June 2013 to 4th November 2023.
This really depends on how the particular paste is made. I’ve never seen MX-4 (carbon) or NT-H2 (ceramic) de-emulsify.