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.
LP: Shea Moisture (currently JBCO)
Conditioner/CW: Jason Aloe Vera
LI: Aunt Jackie's Curls & Coils Quench
Refreshing: TRESemmé Naturals Aloe Vera & Avocado
Gel: DevaCurl Ultra Defining Gel
DC: Aunt Jackie's Soft & Sassy Super Duper Softening Conditioner
Treatments: Coconut oil/Coconut milk
UK curly. CG since Oct 2013.
Growing my hair to WL when dry