Harsco Environmental’ s SteelPhalt has been developing and manufacturing high performance asphalt products for roadmaking in the UK since the 1960's In both Rotherham and Cardiff, SteelPhalt’s locations are ideally positioned to source slag from the surrounding steel industry producing sustainable asphalt products with 95% recycled materials. With a reputation for first class products and service matched by a commitment to innovation and sustainability, SteelPhalt works in partnership with councils, local authorities and contractors nationwide to deliver durable roads for a sustainable world.