I have both tubes and slime in the front tires of our Allis 5040. We also have a lot of Osage Orange thorns in our area. Last summer one tire was flat and the culprit was a big thorn located right on the top of the tire as it was setting. I pulled the thorn out, jacked up the wheel, rotated the wheel so that side was on the bottom and the slime would run to the hole. I then filled the tire with air and let it set for a couple of hours. I haven't had to put air in it since. I am a firm believer in slime. Others may have more data on other products but slime has worked well for me for many years, even on bicycle tires.
A. Metcalf