since I feel like there’s gonna be a resident expert on the subject on Trapperman.

I want to make it so my driveway never grows weeds or grass, preferably for years at a time. What is the best option for a ground sterilant that will kill everything, I’m talking nuclear fallout levels of dead vegetation. Casaron? Noxall? Some homemade concoction?

Watching. I have a patch I want to do that also.

Imazapyr will get you about a year on pretty much anything that grows in a yard around here. Its a slower kill herbicide so it gets mixed with roundup a lot to give the quick kill and let the imazapyr take over. I've only used it to keep a dead spot around some farm equipment and didnt need the immediate results. Not familiar with the two you mentioned but I would say anything that gives full control for a year is probably about where you should set your expectations. A lot of herbicides can provide control for a few plants for 2+ years but as far as I know, there isn't much that will cover the full spectrum of grass and broadleaves for that long. I could be wrong though.

A good dose of hay and stock salt will help. Worked for the Romans. Non toxic unless you eat too much of it.

I have used a product called Rm 43 in a maroon jug from Tractor Supply.

Following
I find the plants that spread by roots, the hardest for me.
Deep stuff like thistle, ect.
Nothing yet for me

RC, I worked with industrial weed killers for over 35 years. What you are asking for is the holy grail. If you consider the impact to surrounding vegetation, including trees, and the likely-hood of herbicide movement from the treatment site, there's no good answer for residential use. By necessity, all herbicides with residual control characteristics have to be water soluble to some extent in order to be absorbed by roots of the target vegetation. This makes them available to be absorbed by the roots of not only the target pests but also by desirable plants including trees and shrubs. This same characteristic also makes them prone to movement from the application site. How much movement depends on the water solubility of the chemical, the amount of rainfall/moisture it receives, and the soil characteristics. They are fine for industrial uses such as railroad beds, plant sites, road shoulders, and electrical substations applied by professional applicators, but can get joe-blow homeowner into a lot of problems. Most of the more effective residual herbicides have labels that read not for residential use. Whatever product(s) you have an interest in READ THE LABEL, READ THE LABEL, READ THE LABEL.

Squierrelslayer's advise is probably as good as you can expect. You might find others. Avoid products containing bromacil or hexazinone

I actually dumped a bag stock salt leftover from salting hides all over a section to see how it works. It appears that it is dessicating the grass but it’s only been a few days. What’s the rationale for adding hay to the mix. I like the idea of salt since it’s so cheap

Pramitol

Thanks for the info, what would you recommend for residential?

Haha, I don’t know much about herbicide, but I’m getting my commercial applicators licence soon.
For now, I just use gas. Gas kills stuff……lol

I need something that kills elms.

If you use enough boron it’ll do the same.

The hay and stock salt is the name. Hay is not part of the treatment. Just salt. The bags I had were labeled "hay and stock"

Timber companies apply a product called Arson to newly planted loblolly pine stands. Keep sweet gum from over taking the pines.

Always wondered if pickle mixture from tanning would work. Salt, acid, and soap.

KansasAce nailed it.

Pramitol

As mentioned, be cautious of the label and other nearby vegetation that you might want to keep

RC, I had a response all typed out and a thunderstorm scrapped everything.

Kansasace2's recommendation is a viable option. Pramitol is a potential alternative with the risks of non-target effects and movement somewhat minimized. However, in the realm of industrial alternatives it is considered a weak performer. It will not meet your criteria for a multiyear solution.

The Arsenal Charles mentioned uses imazapyr as the active ingredient as mentioned previously. The manufacturer, BASF, offers a product under the brand name Sahara. This is combination of imazapyr and diuron. It's fairly effective but won't give you multiple years of control. And, it presents a risk to adjoining vegetation, including trees, that may have roots extending in the treated area. I'm unsure of the label restrictions regarding residential use...READ THE LABEL.

As for the non-commercial alternatives suggested, some can be quite expensive, especially if you're treating more than a few hundred square feet. Nearly all are going to require a high volume/weight of material in the application rate to be effective.

Let me sum this up by saying that even though I have decades of experience in the field, I do not use such products around my own residence. I may have to spray glyphosate (Roundup) two or three times a year, but I have too much to lose if if something doesn't go just right.