PolyFlex DS Rapid Concrete & Asphalt Crack Repair 12 Pack 21oz. CartridgesPolyFlexDS repairs set up to a more flexible repair. PFDS is ideal where there is a lot of motion in the pavement. The polymer is available in gray or black and can be topped with gray or black sand to match your pavement. Make sure the crack is clean and free of moisture. If there is a lot of water, use a blow dryer or torch to make certain the crack is dry. Open cartridge and squeeze PFDS directly into the crack. Use a scraper or straight edge to