I purchased this for use with a herbicide. This was the only spray indicator I could find locally. I hesitated to buy this after reading the reviews but didn’t want to wait 2-3 days for it to be delivered if I ordered because it would have arrived after the weekend. I figured I would take a chance and go for it. I mixed a little extra in the first tank because reviewers said was hard to see. This wasn’t the case for me, I was able to see it perfectly. I mixed as directed for all subsequent tanks and it was fine. After using it, I went back and read all the reviews again. It’s obvious that at least two of the reviewers mixed the concentrate too light. 6oz for 40 gallons? Seriously, read the directions! Another reviewer mentioned they mixed as directed but again mentioned they used the whole bottle for 40 gallons, which is completely wrong. I could clearly see everywhere I sprayed and where I had missed. It was clearly visible for a couple days after I sprayed it. I over-sprayed about 6 inches of my concrete driveway because I wanted to make sure I got all the weeds. It disappeared completely within a few days. I also spilled some of the concentrate on a concrete walkway which I washed off with a hose as quickly as possible. It left a faint stain which also disappeared completely within a few days. I also got some on my hands which stained as expected and disappeared completely after washing my hands a few times. This stuff made this chore much easier. I will use this again and suggest you use it too. Just make sure you read the directions and mix the appropriate ratio of concentrate, water and product. You won’t be disappointed.

GAVE THIS ONE A TRY AFTER USING A "BLUE LAZER" FROM AGRISUPPLY. this one Doesn't cover as good and it's a worse value for the money. I do not recommend trying this on a tractor boom sprayer. It maybe okay on a backpack sprayer.