AGEPAN® Loose Fill is manufactured from the natural raw material shale, in a special thermal process. AGEPAN® Loose Fill does not contain any chemical additives and is therefore a high quality,environmentally-friendly material with outstanding grain strength. Loose fill is used as footfall soundproofing and thermal insulation to level out uneven floors and is a tested element of the AGEPAN® Floor System. This non-flammable expanded shale should be compacted when laid with a fill depth greater than 5 cm.