The only thing I s
The only thing I see with Ultra Black is that it's not a strong seal. It deteriorates easy..... but, conversely it also comes apart easy and cleans easy. I like use Ultra Grey on everything just because it is a little more durable than the ultra black.... still cleans easy. But I noticed on the China walls that with big vac that it occasionally separates at the surface ... so recently started using Grey Right Stuff just on the china wall. Seems good....I quit using the right stuff for that very reason, stock rebuild that's going 100,000++ miles, sure, race shit no... LOL
I use ultra black now, serves me well...