Efflorescence is not a rock band. That’s Evanescence. Efflorescence is the white, chalky substance that appears on concrete, pavers, brick, and stucco. It is residue that is left behind when hard, ...

Q: I have noticed a white powder around the edges of my concrete walkway. Should I be concerned? A: The white powder is the result of efflorescence, which occurs when a soluble salt, such as earth, ...

Q: I found your Dec. 3 advice about removing rust stains from concrete pavers to be quite interesting. I have a problem with stains on concrete, though not from rust. We recently put down a concrete ...