When my hair seems on the dry side, I like Generic Value Products Conditioning Balm (GVP CB) from Sally's. It's a generic version of Biolage Conditioning Balm. I'm pretty sure it doesn't have protein, but I could be wrong. If you want regular conditioning, leave it on for 3 mins or less. For deep conditioning, leave on up to an hour or more. The max I've done is maybe 20 mins, but my hair feels like silk afterward. I've heard of people using it as a leave-in with good results, but I have always suspected it would be too heavy for me.