S&B is their premium ammo (Czeck Republic, IIRC) I've used a ton of it. the red lacquer sealant was required by their military back in Soviet days.
They are probably using a very tiny dab of clear sealant now, the way our American premium ammo makers do.
For those who have fought for it, freedom has a taste the protected will never know!
Or at least they did before political correctness