Just to add put a thin smear under each front cap as well, as they leak here, and trim the gasket where it butts up against the caps,to make sure the hole is perfectly in line before applying half moon gasket sealant, I use gasket just dabbed on the recess the half moons sit in just to hold them there.
As said sounds like a COMETIC these are reuseable FOAM ALLOY.
tabetha