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I don't know about the consumer packaged stuff, but practically any Roundup we buy today, even the generic stuff, is fully loaded with a surfactant package, there is no need to add more and research we funded has shown that adding more surfactant actually reduces weed kill. The one exception is the addition of ammonium sulfate fertilizer to buffer the water if your tank mix water is above pH of 6.5 or is very hard water. Surfactant alone will do practically nothing to buffer hard water, ammonium sulfate is by far most effective at a rate of 17 pounds/100 gal of solution.
Glyphosate (the active ingredient in Roundup) is not a restricted use chemical, anyone can buy it in any of it's many formulations. The Powermax fully loaded 6 pound AI product is currently about $15.50/gallon in bulk, which is probably about what a pint of consumer packaged 4 pound AI product is on the shelf at your local Home Depot.
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.