Doug:
I don't think it's a different type of romex (NM cable) but different types of spray foam!
The polyurethane type you linked to and NM cable have issues, however the latex based spray foam is not an issue with NM. IMHO, Reno is referring to the latex based product.
I have not come accross any 'foam' being used for sealing conduits btwn different temperature areas. The polyurethane based foam may not have any effects on THHN/THWN/MTW as it is gasoline/oil resistant. Duct seal is the product of choice.
