Hmmm, I'm not sure. I've used it as both a RO and a leave-in and have never noticed any build-up. I don't co-wash, but I low-poo with the Shea Moisture Coconut & Hibiscus shampoo and have never had issues.
I know some will disagree, as for quite a few here Shea Butter can build up. Just, in my experience, it's never been an issue
3B. Med porosity. Med thickness. Med density.
Low-poo: Shea Moisture Coconut & Hibiscus
Conditioner/co-wash: Jason Moisturising Aloe Vera
Leave-in: Aunt Jackie's Curls & Coils Quench Moisture Intensive
Refreshing: TRESemmé Naturals Nourishing Moisture Aloe Vera & Avocado
Gel: Ouidad Climate Control Heat & Humidity
Treatments: Once a week, alternate between Coconut Milk and Coconut Oil before washing
UK curly. CG since Oct 2013.
Growing my hair out Rapunzel-style