Deva NoPoo (and a lot of their other products) has Polyquaternium-7. I find that it "coats" my hair and doesn't allow it to absorb products. For me, it requires a rather strong surfactant to remove it (although I've been told that it's not buildup.)
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08

SE PA

HGs: Anything Sevi; Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; UFD Curly Magic (now Hello Curly Curl Stimulater); Botanical Spirits Jellies, CJ Repair Me, Marie Dean Leave Ins and Curl Creams