The multicellular, closed hollow spheres are produced from a volcanic raw material which is formed to a white, intert material with high volume by a special expansion process.

They are a white, inert mineral of volcanic origin, which – thanks to a special expansion process – features multicellular hollow spheres conveying a high volume. The bulk density varies per particle size between 100 and 265 g/l. This feature allows to reduce the specific weight of coatings and thus their consumption on the
surface.

Both hydrophobic (surface treated) qualities for pasty coatings and hydrophil (no surface treatment) grades are available for hydraulic coatings or smoothing cements. Important uses are light-weight trowels and spackles, as well as body fillers for vehicles construction, as well as general weight reduction in surface products (e.g. textured coatings).