Description IsoEdge and IsoSonic Ceiling Strip are a pink, acoustic foam strips with a self-adhesive backing. Application Acoustic insulating foam designed to reduce flanking sound transmission when used with the IsoSonic range of floor and ceiling systems and in Robust Detail approved constructions. IsoEdge 6/260 is appropriate for:  Isolation Strip for screeds for use in Robust Details E-FC-4, E-FC-12, and E-FC- 14. Also suitable for use in non-Robust Detail applications.