My question was an honest one and not intended to make the
OP feel bad. He has a Ritter block to do that!

It was not obvious to me that it was a misspelling of "porosity". I knew it to be a word with meaning far from the automotive world. It couldn't be that so maybe it's some kind of local or regional name for block sealer?

Anyway, OP, thanks for the clarification. No need to apologize.
To the group, he answered my question so let's move on.

Question: Is there ANYONE running a Ritter block without problems?

R.