Red Brick Dust is one of the oldest form of spiritual protection in Conjure for establishing barriers for homes, sacred spaces, and during rituals. 
As a symbol of endurance, red brick dust has a legacy that stands the test of time. Its red color signifies vitality, strength , and power. 
Red brick dust grounds spiritual work because its durability comes from its use in building structures and the sweat of human effort, thus carrying ancestral energy  as well. 
Traditionally, red brick dust is swept or scrubbed on your front steps to ward off evil, curses, and negativity or scrubbed inward to draw money (mixes great with cinnamon). 
Placing a line of red brick dust across the threshold of your door will work repel malevolent forces at play. 
Red brick dust can be sprinkled into floorwashes to help with cleansing your home or business or when you're trying to juju your business to bring in more sales and customers.
You can also sprinkle red brick around the perimeter of your home to ward off thieves. If you live in a smaller place, such as an apartment, you may want to put a line of red brick dust and black salt on your windowsills to put a barrier of protection around your living quarters. 
Red brick is also associated with luck, so it is also good for using in mojos and other charms or rituals used for generating quick and solid fortune.