I don't use it on the length of my hair but I do use a waxy type product on my hair line to lay down my edges (Beyond the Zone Stiff Head) I feel like a good heat protectant and the right flat iron will prevent reversion. Also I only flat iron when I know I won't be sweating or the weather will not be rainy or humid.
negative...It doesn't take much to weigh my hair down, Beeswax would probably give me a nice stiff head along the lines of edward sissorhands. Chi Silk infusion or some silicone serum is enough for me.