Re: Sound deading material. Home › Forum › Ask A Member › Sound deading material. › Re: Sound deading material. stevehUS Member - 1 Year (includes $3 online payment fee)Replies: 127Topics: 26 September 12, 2018 at 9:46 am #82697 Somewhere I read about a guy who put a plastic bag over the power head, put the cowling back on and used spray-in foam…