Schluter DITRA-SOUND impact sound insulation for tile coverings (750x550x3.5mm tile). Schluter DITRA-SOUND is a bonded impact sound insulation for tile coverings. Made of a heavy polyethylene mat, with an anchoring fleece laminated on both sides to bond with the tile adhesive. Schluter DITRA-SOUND reduces the impact sound of floor constructions by 13 dB.