Mann McGowan DD-420S, is a robust threshold seal providing acoustic, cold smoke and environmental sealing when used in conjunction with suitable doors.

DD-420S has achieved a 30 minute fire rating when tested to BS 476 pt. 22 1987.
Acoustic values of upto 34dB can be achieved depending on door type selected.

• High quality aluminium threshold seal
• Seals gaps up to 13mm
• Simple to fit with slide and click mechanism
• Easy to adjust using slot head screwdriver
• 30 minute fire rating
• Excellent noise-reducing performance up to 34dB
• Available in 3 standard lengths 630, 930 and 1130mm
• Optional end plates and cover plates