Hookless just means the bead seat on the rim bed holds the tire in place, rather than having the hook on the rim help. Really, the only tubeless tires that are not hookless compatible should be tires that need more than 5 bar pressure - then you really need that hook.
Where is the air coming out from?
I've used skinnystrippers to fix issues like this in the past - even works going ghetto tubeless (using cloth rim tape). They end up making an air tight air chamber with the tire, so it doesn't need a wheel to hold air (not that they will take a lot of pressure off the wheel). Prevents burping and leaking and make the tire easier to seat. Probably not needed with a good matching wheel/tire, but they help in situations like this.
Keeps the latex off your wheel if you want an easier time cleaning too... ;-)
I find the sealant usually will seal it up pretty well in a week or less. The interiour of your tire is getting lined with latex and it should become air tight.
I use Orange Seal (for what its worth), but I have had it seal up continental road tires with a little patience (yeah, I can see it seeping out through the sidewall for a few days until it dries and seals)
Quick follow up to my post above: Panaracer through its rep working with Lindarets Cycles (Albuquerque, NM) replaced my too quickly worn GK 38's. (See posts and pics above.)
BTW, Lindarets and Marc Basiliere is a great shop to work with!
I am running the 43mm GK SS on a Hunt 30 rim so the inseam is 23mm. I did have a premature failure on the tire. I sent pics off to Panaracer and boom I had a replacement tire within days, free of charge. Iowa gravel, I suggest 43mm tires, with large chunk and also sandy roads. I have about 1,000 miles on them and when my failure occured it was around 400 miles. The tire seemed to be seperating in an area and then opened up. At first I thought it was slice, but when I took the tire off, it was evident it was not a slice. Overall, i am happy with them, and they run a bit larger than advertised.
