Bronze Lower Mirror 20 offers a balanced year-round performance of good solar heat rejection with a more neutral external appearance. This film is used for architectural and stylistic reasons and, while metallised, have a muted bronze interior and exterior appearance. Opalux bronze lower mirror 20 is used where a more neutral appearance is required, and are ideally suited to architecturally sensitive applications such as listed buildings. These films achieve good solar heat and glare control, rejects up to 75% total solar energy, and provides a glare reduction of up to 77%. Depending on the type chosen, can still allow vision both ways, and make less visual impact than traditional mirrored films.