Norsound's revolutionary retro fit seal increases acoustic performance of a standard door simply and effectively. Its design is based on ‘dual air pocket technology’ which acts in the same way as triple glazing.

The NOR710 also has smoke seal capabilities in accordance with BS 476: Part 31: 1983 and is unaffected by door furniture including hinges and latches. This multi purpose seal is perfect for applications that require a smoke and acoustic seal and it is acoustically capable of achieving up to a massive 48dB reduction.

We have cycle tested the NOR710 acoustic door seal up to 1,000,000 opening and closing cycles.