Sound Down tape ?

[Raider Ronnie]

Need to put the Sound Down back under my engine box.
The silver foil tape over the seams.
What is it and where can I get some ?
Thanks

 

[Pitou]

I've used the Sound Down foil tape and regular 3M HVAC foil tape from the building supply store. Pretty similar stuff, but much less expensive at building supply.

Here's a link to Sound Down products at Defender Warehouse if you want Sound Down products: Scroll towards the bottom of page
Defender.com Search Results: sound insulation

 

[F/V First Team]

Mylar with fiberglass threads.