On Mon, 15 Aug 2016 18:27:04 -0400, Ed Pawlowski wrote:

I've been in the foam business for 46 years. I'd use latex paint. I
know of applications that are many years old and still in good
condition. Any color you desire will work.

Do you use a circular saw or sabre/jig saw? I see there are special blades
for cutting foam: https://www.amazon.com/dp/B00KM0RLUU

I also see a mention of foil faced foam. Then I would use foil faced tape.

I would think Liquid Nails would attach the foam to the ductowrk.

Don. www.donwiss.com (e-mail link at home page bottom).