Do you use breathable lime mortars to repair your brownstones?

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Who here has experience working with Natural Hydraulic Limes, Ecologic® Mortar or Lithomex for brownstone repairs? Here’s a video of a recent repair done using historically appropriate materials while also being conscious of the environment.    http://www.youtube.com/watch?v=nf7F3B1QQT4&list=PLvwpWxpGHjJcImsKRXHUmVtInXMsuQyU5&feature=plcp