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.
I have decade old tubes. Maybe some bits around the entrance can dry out if you didn’t clean them after use but it doesn’t seem to be an issue for mine as far as the inside stuff goes (of course I put the cap back on as well).