Duct Tape Rim strip (gorilla tape) and Caffelatex.

seems to be working just peachy

with my Mt Kings on the Velocity P-35
semi rough rocky terrain.
Getting the Mt Kings to setup and seal to the rim is hard on such a wide rim but once it does they are awesome.
One other trick I learned with the caffelatex is that it doesn't like to work well under high pressure. When setting up tires for the first time I normally pump it up right to the max rated pressure to seat the bead and get the liquid everywhere and also to give it some bleed off pressure. Issue is the liquid just blows right through the holes at that high a pressure. I have found that if I set it up, set the bead, quickly swirl the fluid inside the tire then lower the pressure to under 30LBS the punctures all seal right up in a minute instead of squirting all over the place. Let sit over night then set the pressure where ever you want.