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My limited experience with sealing is that what you use matters less than what you do with the wood.  Moisture will escape from the fibres, what sealing does is stop it taking the easy way out via the end grain and causing splits.  The first tree felling bits I sealed all split, I had left them round, bark on. Second time I halved them, crudely along the axis with an axe and wedges, don't own a chainsaw mill, then generously sealed the end grain.  Old paintbfor some, pva on another batch.  They seem to have given much better results, I assume moisture is leaving slowly along the axis cut.  Species vary, I was given some fresh cut field maple branches which is fine, I lost more of the fresh cut greengage and cherry which seem prone to splitting.  Timing matters, on the day is best, a week later may be too late especially in hot weather.   That being so, sealing immediately with what you have to hand may be better than worrying too much about what it is you use.  I don't have a kiln, they lay on a concrete garage floor up the middle with a car parked over them some of the time.