Vinegar can be used to clean indoor or outdoor brick. It's especially effective on efflorescence, the chalky white salt crystals that build up on the mortar. Mix 1 part white vinegar to 5 parts water and use it to remove the efflorescence with a scrub brush.

Will vinegar damage bricks?

Never use vinegar on any kind of paver, brick, flagstone or concrete; it WILL damage the surface.

What kind of vinegar do you use to clean brick?

One natural brick cleaning solution that many lean toward is a 50/50 vinegar and water mix for brick that needs to be refreshed. Not only is it safe for the kids, it can also be very cost effective and leave your home with clean bricks.