Yep, we are out own worst critics!
There are the two forms of Zinsser, wax(ish) and dewaxed. "Bullseye SealCoat" states "100% wax free" at the bottom of the front can label. 2lb. cut so a typical 1lb. cut will let you get 1/2 gallon from the quart can. I just use the "alcohol" labeled 1 gal. cans from the big box stores or Walmart.
I have used TransFast dyes (powdered) with a water based poly (Minwax) and it worked fine for one large project on white oak. I sprayed the water.dye mix directly on the raw wood, wiped it down to equalize the color over the surface, then sprayed on the WB poly. Not quite dark enough do I added some to the poly directly as a toner.
That was about 20 years ago so I don;t know if it is still made, but it specifies mix with water (no mention of other solvents).