Weisshorn Butyl Car Sound Deadener Deadening Insulation Material with Application Roller 32CM X 50CM X 24pcsImprove your vehicle NVH performance with the Weisshorn Sound Deadener. Made of top quality butyl based rubber and an aluminium top layer, this lightweight deadener is a non drying self adhesive mat that absorbs sounds and shocks for a quieter ride. The eco friendly material is non toxic, odourless and non corrosive Better till, it performs well even in extreme temperatures of hot and cold and is excellent for sealing against water and air ingress.