PRIMA Flex Groove is a fibre cement lining product, manufactured from Portland cement, finely ground sand, premium virgin Kraft softwood cellulose fibre, additives and water. The materials are cured under high steam pressure autoclave to create durable, dimensionally stable properties before being shaped as a final product.

PRIMA Flex Groove lining is manufactured to conform to the requirements of fibre cement sheets (MS1296:2010) and is classified as Category C for internal applications and Category A for external applications.