Non-issue is right! Adding a tiny fraction of isopropyl alcohol will not fix his 25% mix of water/alcohol emulsion and turn it all back into "normal" looking gasoline. The other two ingredients in SeaFoam, naptha and pale oil, will do nothing to the water.
Nope, ain't gonna happen, no common additive will recombine phase separated E10.
I never said adding a tiny fraction of isopropyl would "fix" anything. I was simply responding to your original quote:
I'm not a fan of Seafoam. It is Pale Oil, Naptha and ALCOHOL!
That quote, standing completely on its own as you posted it, sounds provocative. Especially since you typed "alcohol" in all caps like it's a big secret or something.
But provocative it ain't, because anyone that has ever added any isopropyl additive to their tank has exceeded the Seafoam dosage by several times.
And a big secret it also ain't, because just like any other product on the market, a simple Googling with keywords like "Seafoam MSDS" will reveal what's in it.