You should be able to use a low-poo rather than doing a sulfate wash. This gives a decent list of different cones and the types of cleansers that can remove them from your hair.

http://www.naturallycurly.com/curlreading/silicones-no-poo/whats-the-scoop-on-silicones

3a/f/iii
Modified CG since 11/5/11
CLEANSE: CJ Daily Fix, DevaCare No-Poo, CHS Treatment Shampoo
RO: SS Caitlin's Conditioner, CJ Beauticurls Strengthening
LI: SS Repairing Protein Treatment, CHS Silk Leave-In
STYLE: Re:Coil, Curl Keeper, Deva Ultra Defining Gel, Curls Rock Amplifier,Sweet Curls Elixirs Okra Gel and Hard Hold Gel, SS Curl Enhancing Jelly and Firm Hold Gel