Hang on - sorry to disagree - but is that not a fancy name for common-cheepo thick black underseal that drys hard and then flakes off? Also with no anti-corrosion properties?
Fit for the dust bin only in my opinion - go for Bilt-hamber or Dinitrol. These have anti-rust properties, don't fully dry out and hence dont flake off
Shutz is not underseal as you would of known it, Shutz stays live " never cures" we sell Thousands of tins a month into the Automotive Distributor market without complaint.
And in my opinion Dinitrol is for the over enthuist D.I.Y man with to much money and time on his hands