Purpose of gasket between master cylinder and booster

[Hulsty]

As per the title what is the Purpose of gasket between master cylinder and booster? I currently done have one and in the process of improving my breaks so if its needed I will get one.

 

[roscoFJ73]

Gaskets make up for imperfections in metal surfaces and the cushioning effect helps keep the nuts tight

 

[Yorkshire Devil]

I wondered that too!!

 

[Z()LTAN]

That and it stops mud/water/moisture gettin to the push pin cavity and rusting it all out.

 

[Hulsty]

Cool thanks guys. Been working on it, looks like my vacuum pump is a bit tired.