Why detail a ‘specific acoustic seal‘ over an intumescent based ‘acoustic seal‘?
Primarily the problem of ironmongery stops most of the centrally situated intumescent seals offering a complete perimeter seal. Tests have shown that seals with breaks for ironmongery simply fail to perform (see Norsound technical department for further test data). The seals themselves will work if uninterrupted but latches typically throw 6mm between the stop and break, simply not enough to continue the seal blade.
