Comfort BRONZE 4 - 10 Sheets 4mm 500x700mm Sound Deadening Mat KitComfort BRONZE 4 10 Sheets 4mm 500x700mm Sound Deadening Mat Kit Comfort Mat BRONZE 4 mm is a bugdet mastic vibration deadening mat for zones with high vibration loads. Universal vibration deadening material with thickness of 4 mm has a good adhesion to metal, mastic is made from a mixture of special polymers, reinforced with aluminum foil. The use of a modified elastomer in the composition of the mastic gives the material a good mechanical loss