Wrong, it's fine for aluminium, it's a HOAT.
BTW, the bloody name has been changed, again.......
I'll have to look in the morning what it's called now.
CAT ELC is just the same stuff as Land Rover OAT with a tiny bit of, bugger, can't recall at the moment, but it's almost identical.
Personally I've switched to the Cummins coolant, been using it for over two years now in two vehicles, one with an alloy head, (Tdi) the other an alloy radiator, (Patrol) no issues at all.

