OC Eight Professional Mattifying Gel 30g by OC Eight. $23.45. Oil remains locked away without compromising the skins natural moisture. OC Eight is a revolutionary product that controls facial shine. OC Eight traps facial oil and works continuously for up to 8 hours. OC Eight contains ACRYSORB micro-particles that are specially designed with copolymer technology and work to permanently trap up to 6x their own volume in oil.