Anyone familiar with this product (plumbing vent collar)? Wondering how well it seals with architectural shingles.

Anyone familiar with this product (plumbing vent collar)? Wondering how well it seals with architectural shingles.

I can’t imagine it would seal very well at all. It appears to rely on some sort of sealant described in #2 of this link: http://www.kozykollar.com/Installations/installations.htm