One more important thing: Mix only a small amount of mortar at a time. As an amateur, you will be working very slowly. Mortar begins to set in 15 minutes, and after that it cannot be used effectively.

Tahikem 3 Pack Tile Grout Masonry Mortar Bag, 12" by 24" Heavy Duty Tear Resistant Puncture Tip Cement Sealer Bag, Mortar Bag Masonry, Grout Bag for Tile Installation, Grouting Bag (12x24 inch, Blue) ...

Q-Some of the mortar in my brick chimney is cracked and falling out and I would like to do the necessary tuck-pointing myself. Do you have any advice? A-Scrape out all the old mortar that is loose ...