Yard was seeded 3 months earlier but crabgrass was prolific. Product killed 50 plus percent in early and mid-July. Probably would have done better if I'd had better soil moisture. I also used Duo Stick and it's a must do.
This product was recommended to be combined with Quinclorac for killing crabgrass - it helps the weed killer adhere to the weed. It came at a reasonable price and worked as advertised.
I'm going to assume this product did what it's supposed to do. I mixed it with Drive XLR8 crabgrass killer. The crabgrass is dying so I guess this product assisted the Drive XLR8 to do its job. I will buy it again.