I have used it as a DT in the past, and when I did, I took about 2-3 minutes combing it through, and then I covered my head with a plastic cap, and then kept it in my head at least 20 minutes. You can use it with heat, if you would like to make it penetrate deeper like they do in the Salons, of course.
I have only used it "as is" only, without ever adding anything to it.
Products in my current regime: Nioxin Scalp Therapy Shampoo, ORS Replenishing Pak, Curls Whipped Cream, Curls Souffle, Curls Spiral Curls Cream, Curls Milkshake, Curls Quenched, BB(Bonner Brothers) Growth Lotion
I used it yesterday as a DT. Left it on my hair for 1 hr. and did add some heat. It worked well. Carlos at Devachan, also strongly suggested leaving it on overnight as a DT.
3a Colored, Layered
Cond: CJ Strengthing, Marie Dean, CJ Curl Rehab
Leave -In: Marie Dean Red Clover, Coconut Lime Detangler and just about the entire line, CJ Rehab
Gelly: UFDCM, Paul Brown Geletine Goo
Towel - HG - Curls Like Us