Gladen AERO DAMPING Poly (0.40 m²).

Gladen AERO DAMPING Poly (11.0 mm., 0.40 m²). 

This Polyester acoustic damping product along with adhesive backed for use in an array of enclosure types or behind speakers (not suitable in wet areas). 
It's especially useful in conjunction with midrange speakers. It's also possible to use to decouple and isolate parts.
Water resistant and hardly inflammable (but can absorb water).

Size: 500 x 800 mm.
Weight: 

Price per sheet.