Pour-N-Restore’s Micro-Extraction Technology captures the stain at the molecular level and pulls it out to be disposed of safely, according to Edgewater. It works by penetrating into masonry where it captures the staining molecules. As it dries, it transforms into an absorbent powder. When the powder dries, the company says, it is swept up and the stain is gone. Circle 234 on the Reader Inquiry Card.