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Pointing of old stonework?

Can Polybond be diluted and mixed with fine sand and cement to help waterproof the pointing of an old stone building
Jerry Hand, November 2010
If the stonework is bonded with lime mortar then any modern pointing will trap moisture - lime mortar helps stonework walls to dry out - modern materials will cause problems later on.

More here...

http://en.wikipedia.org/wiki/Lime_mortar

Peccavi, November 2010