[RedhairRedhair]

Have a look at Section 5 of this MSDS

http://www.havoline.com/images/products/pdfs/anti_exlife.pdf

This material will burn although it is not easily ignited.
Not classified by OSHA as flammable or combustible

[Gondring]

Is that the kind of antifreeze she used? Some kinds of BMW antifreeze don’t contain any water at all, although they recommend 50/50 blend with distilled water for many types.
It sounds very odd.