Has anyone used either of these two products? They are made by the same company, just one is applied with a paint brush and the other one with a trowel.
http://www.fireplacemall.com/Chimney_and_Flashing_Repair/CrownSeal/crownseal.html
http://www.fireplacemall.com/Chimney_and_Flashing_Repair/CrownCoat/crowncoat.html
http://www.fireplacemall.com/Chimney_and_Flashing_Repair/CrownSeal/crownseal.html
http://www.fireplacemall.com/Chimney_and_Flashing_Repair/CrownCoat/crowncoat.html