InterCal Slovenija is based in Zagorje ob Savi, about 60 kilometres east of Ljubljana. The history of InterCal Slovenija dates back to 1804. InterCal Slovenija became part of the Wietersdorfer Group in the broader sense in the course of its acquisition by Salonit d.d. in 2005; since 2014 it has been a subsidiary of today’s InterCal Austria GmbH.
Today, InterCal Slovenija produces calcitic and dolomitic limes for ecological and technological applications. The quicklime is intended for the steel industry, for the production of aerated concrete blocks and for wastewater treatment. Hydrated lime and slaked lime for building construction are also produced in Zagorje. Apnenec d.o.o., which belongs to InterCal Slovenija, is both a raw material supplier for the parent company and a producer of limestone and limestone meal for industrial and agricultural applications.