Well in my experience, which is not a ton but I have made wigs before, if the tracks are sturdy, it shouldn't cause a problem as long as you make sure you sew around the wefts and not through them. I currently have impressive-hair's kinky curly wefts in and the tracks are well made and sturdy. However, I do experience A LOT of shedding (did not seal though and might be because it is kinky curly). So sealing would probably help with that, but not sure of what it will do it you split them.
I'm not really giving you an answer, huh? Anyways, do hope it helps somehow
Let me know what you decide and good luck :)