Had the local chimney sweeps out today. They did their routine
inspection and came back with a few things "wrong" with the chimney that
they could take care of me.
The one that I need help with is the brick/mortar sealant. According to
the chimney guys, I've got some spalling going on, and the bricks and
mortar need to be resealed. He cautioned against using "typical
silicone sealants" because he says those trap some moisture inside the
bricks, and when the chimney heats up, the trapped water can cause real
damage. Instead, he said that the right product is a water based
sealant that will repel new water but allow the moisture inside to
Something might have gotten messed up in the translation, but basically
his point seems valid. The chimney is 35 years old, after all, and to
the best of my knowledge, hasn't had any work done on it other than the
Any thoughts as to what products are available to DIY-er for this
purpose? Looking for specific recommendations if possible.
Thanks in advance!