Homebrew mortar question

[Florida Forno]

In the FB instructions it is mentioned that the home brew mortar is made with portland cement as one of the ingredients.
Does it matter what type of portland is used?
I mean like type "S" or type "IA" Type "II" and so on?

[Gulf]

Type S Portland is a mischaracterization. That is what some folks call a 2 parts portland to 1 part hydrated lime mix. Or Type S "masonry cement" to be more exact. Type 1 (general purpose) portland cement is the easiest to find and is what is recommended.

EDIT: Repalced the term "mortar" with the terms "masonry cement".

[Florida Forno]

Thanks Gulf!