to remove stains from concrete floors

Concrete stains are most often a problem in a garage or basement, but they also can be troublesome on patios and sidewalks. Removing them often requires persistence, but the right materials and methods generally bring success. Try to attack a stain as soon after it happens if possible; the longer a stain sits, the deeper it is absorbed into the concrete or cement. Older or damaged concrete is especially porous and more extreme measures may be required for set-in stains.