QUESTION ABOUT FOLIAR FEEDING

Hey everyone, I just wanted to ask you about this thing that is rolling in my brain lately:
I have a product for foliar called Protect Killer and on the bottle is said: Better not mix with alkaline reaction products or Sulfur.
I wonder, is just the ph making the product ineffective or the alkaline substances alone?
If i, for example, stabilize the PH of the silicon alkaline water with PH Down to about six and then mix the product? Will this be good? Thanks Everyone

Neem margosic acid probably suffers some irreversable possibly exothermic and producing sulphur gas idk im not up on its organic behaviour but it might not be good to shift its salts and reactions to aljaline side.