That said, I am somewhat in doubt that the lack of a sealer is your issue. For one, Easylease is supposed to be a 1-part system that includes a sealer. So whilst the application of a separate sealer shouldn't hinder the performance, I'm somewhat sceptical that it would actually aid it much if at all. And secondly, I have used all the aforementioned release agents with and without sealer. The Zyvax Flex-Z is more like the Easylease in that is has an inbuilt sealer, but the Frekote and the Marbocote are supposed to be used in combination with a sealer. There is no difference in release between the Frekote/Marbocote with or without a sealer. It releases just fine without the sealer, and it release just fine with the sealer. The only difference I have noticed is that it extends the life of the film. So instead of the 5 or 6 easy pulls that I will get without a sealer, I will get 9 or 10 easy pulls from the mould if I apply the sealer first. That's the only difference I can notice, everything else is exactly the same.