End grain sealer would also work. I use it for hardwood to stop end checking on hardwood logs that will be sawn into cabinet lumber or other top shelf uses. It is a wax based very thick paint. Available from United Coatings or Baileysonlin.com Apply as soon as the cookie is cut and then plain it off after the cookie has fully dried which will be a rather long time because thew drying will only happen out thru the bark as the grains will be sealed. I buy the sealer in 5 gal pails, don't know if smaller sizes are available. It is applied by brush, roller or sprayer, any way will work. Make the cookie a little thicker than you want to finish with because the sealer will soak in up to 1/8' and more at any check marks. Yes some sheck marks are there even with fresh cut logs (or cookies)
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.