That’s Pendimethalin and Killz-All is glyphosate. You shouldn’t have an issue tank mixing those two. I would always do a jar test. Mix a little of the two in a jar, shake it up. Give it a few minutes. If it stays mixed together and doesn’t septate or turn into sludge or a hard compound you’re good to go.
That said I’m not a huge fan Pendimethalin. You need to make multiple apps per year at a decent high rate per label. Cost per acre is pretty high. You would be better off going with Prodiamine. 65 wdg. Both are the same mode of action, but Prodiamine will give you a longer residual. You can get good results with two applications a year at a fraction of the Pendi cost. Dithiopyr would be a good option. Cost per acre should be a little cheaper than Pendi.
Pendi is a good pre emergent. But just not the most cost effective. And make sure it gets watered in soon after applying.
Here is a good write up on the 3 most popular pre’s.
Dithiopyr-vs-Prodiamine