Like the RoundUp Pro you've come to know and trust, Roundup Pro Max controls a broad spectrum of weeds with virtually no re-growth. With its more concentrated formula, one gallon of ProMax contains the glyphosate acid equivalent of 6 quarts of Roundup Pro. Roundup Pro Max has a unique surfactant system that's more concentrated and gets to the root faster, so you don't have to worry so much about the weather and rain washing the product away.