Outokumpu products available in Finland through Finnish roadworks company Destia include OKTO insulation, OKTO aggregate and Croval.
OKTO insulation is a stone by-product manufactured from molten ferrochrome slag through granulation. With better thermal insulating capacity than natural materials, as well as a high load-bearing capacity, it is especially suitable for road substructures and drainage ditches. The fraction of OKTO insulation material in standard production is 0–11 mm.
OKTO aggregate is manufactured from air-cooled ferrochrome slag by crushing. Thanks to its superior firmness, it is ideal for creating wear-resistant asphalt and concrete coatings. The fractions of aggregate in standard production are 0/5 mm, 4/8 mm, 4/11 mm, 8/11 mm, 10/16 mm and 16/22 mm.
Croval aggregate is a preferred material for heat-resistant structures in fireplaces with a melting point of 1,700 ºCelsius.