Chimey flashing issue

Had new roof put in with chimney reflashed. An hour after the chimney flashing was done yesterday evening, heavy rain came down. Today saw two sides of the chimney where water runs down darkened. Suspect some of the black sealant used got washed off in the rain. Any opinion about the flashing is really appreciated. Here are the pictures: having problems with uploading pictures, any recommendation?

Add the pics to your album!

“Black” sealant does not sound good at this time!

Sounds like roof tar.

Hopefully it’s just black flashing and black NP-1 but I don’t think NP-1 would run down like that even if it was installed in the rain.