How can I mix someithing (that you can glibly buy) that will massacre grass forever? Or almost forever... I want to kill every bit of backbone yard grass...

Or almost forever...

I want to kill every bit of backbone yard grass I enjoy. So I can put in cement, rubber flooring and a play ground.

Its a BIG nouns....so Killex or RoundUp is too expensive.

Ideas??

thanks!
Answers:    Straight vinegar will butcher the grass and it is not harmful to the environment or your kids and pets! Just put the vinegar within a sprayer and spray away. Remember, vinegar will also damage GOOD plants so be sure to hang on to a distance away from shrubs, etc.

Another option is to rent a sod cutter. It will remove adjectives the grass for you immediately so you don't enjoy to stare at a big mess of dieing grass. You just cut and afterwards roll up the sod...just close to they do on sod farms.
Use a black tarp... consequently move it around to different sections of the patio. Dead grass... and you've still got a functional product for your investment.