Building a door out of MDF+rockwool

[adamski]

Hi again

I'm gonna build me a door out of 2 layers of MDF on a 2x2 frame stuffed with rockwool. I currently have a load of 45kg/m3 rockwool for my walls, was going to use some of that but thought it may be better to use very high density rockwool for this purpose. Would there be a marked difference using a higher density?

Thanks!