Sika opens concrete admixture plants in Nigeria and Ivory Coast Share 30th September 2015 Swiss specialty chemical group Sika has opened its first concrete admixture and mortar production plant in Nigeria and Ivory Coast. It has also established new subsidiaries in Ethiopia and Tanzania, with an aim to expand its business in Africa. So far, the company has expanded its presence to 16 countries in the African continent. Sika EMEA (Europe, Middle East and Africa) regional manager Paul Schuler said: "Our new production facilities in Nigeria and Ivory Coast and our new subsidiaries in Tanzania and Ethiopia represent another milestone in the consequent execution of Sika’s Strategy 2018.