Roundup for lawns (Grayslake downtown)

I bought this Roundup last year to try to kill an invasive weed, turns out it no longer has glyphosate in it so it did not kill that weed. However, apparently it’ll kill a lot of other weeds without killing your grass. The 1 .33 gallon jug with sprayer is almost full, and the 32 ounce concentrate is unopened.