I think I over torqued my breathers the first time.... I was a little more liberal with the sealant and lighter on the torque this last time and feel I got a better seal. I also cleaned the actual valve cover with naptha to get all the oil off and allow the sealant to stick good and let everything sit for over 24 hours to cure as stated in instructions for sealant.
I dont think it was the type of sealant I used as much as me not getting the surfaces really clean/dry and not allowing the sealant to cure before driving.
Fortunately it is a fairly easy task and is just a nuisance to do over.