The Dennert Poraver GmbH is the worldwide market leader in the production and distribution of expanded glass. It is among the ... pioneers in the field of innovative lightweight fillers. 30 years ago, our manufacturing method was developed for commercial production of expanded glass granulate from post-consumer recycled glass – a milestone in the company’s history. Since its establishment in 1983, the company is manufacturing at its plants in Europe and North America the innovative lightweight aggregate Poraver® for customers and sales agencies all around the world. read more