Filler and preservative powder BTU. Used in secondary treatment of viscera, internal packs cavitated areas due to cysts and neoplasms, and as a cavity filler after autopsy. Used as a bulk and compacted filler to reinforce preservation and restore natural body contours.BTU special composition antibiological, absorbent filler with a 15:1 absorbent capacity, especially developed for the autopsied body where cremation is the preferred choice for final disposition.Retort and environmentally friendly compound.