ABC 3 vs ABC 4i

[longjonsilver]

i have read on this forum people expressing the view that ABC 3 bottom paint is the most cost effective paint available. i found i locally here in Halifax but ABC 3 is only available in 5 gallon pails. The salesman offered me ABC 4 in one gallon containers.

Does anyone know about ABC 4 and how it compares to ABC 3?

thanks
jon

[sailorboy1]

it has 29%copper compared to 47% for the ABC3

BTW my ABC3 is now 10 months old and has done excellent