Wella Products Question

Heat in any form helps conditioners and proteins bond to your hair better. It isn`t necessary but will help. Personally I prefer non-direct heat with a heating cap.

And yes, any benefit the protein provides is washed right down the drain with the water. Unfortunately, hair is dead as a doornail from the moment it emerges from your scalp. Protein reconstructors only serve to coat the hair shaft, making it less vulnerable to damage. The effect is only temporary. I hope this helps!