This heavy damper layer is the same as the one used in the middle of each material. It can be used beneath carpets and as a centre core to double thickness bulkheads or on the bulkhead before the noise insulation is applied.
Results can be spoilt by a poorly fitting hatch or a panel which rests straight on a timber frame. As with a car door, a sealing strip should be applied as a cushion, and Halyard Hatch Tape is designed for this purpose. Made from self-adhesive neoprene foam for maximum oil resistance, and available 19mm (3/4") or 25mm (1") widths.
Joining tapes are available for use with each face. Tapes can be difficult in damp machinery spaces with high temperature variations.