Design Engineering 050502 Floor & Tunnel Shield II 21" x 48" Adhesive Heat and Sound Insulation (7 sq. ft.)

This is a very high quality product but there are things you need to know. First, it is not like working with that rubberized sound deadening material that goes under your carpet. This uses a much thicker aluminum foil over a fiberglass material with a very aggressive adhesive. To give the adhesive its best chance, I started by cleaning my 140k mile floor pan multiple times with mineral spirits, prepped it with scotch bright pads and sand paper, then and gave it a fresh rattle can paint job. I let the paint cure for a week before installing the tunnel shield. It took a 42x48 and 21x48 sheet to do the entire tunnel area from frame rail to frame rail of my '04 Miata. Once the adhesive makes anything more than the lightest contact, its difficult to remove without separating the fiberglass layer so get it right the first time. I created a template with paper bags and masking tape. then cut the template in such a way that it would lay flat. I then layed out the template pieces on the tunnel shield material to plan my cuts. I bought an inexpensive pair of scissors (ASIN B00LSWLAA8) and they made it through the job... I needed to stop periodically to clean the adhesive and fiberglass off them. The cut edges are sharp so wear some gloves! I roughly contoured the tunnel shield to my project BEFORE removing the paper backing. I then carefully positioned my work and gradually removed the paper backing while rolling it in. Work slowly and deliberately. The foil is flexible enough to roll into and around contours but it does have its limits. The roller I used: (ASIN B07X5SV5FD), its a good quality product that should last through many projects. You'll need to seal the edges since water could get into the fiberglass layer. DEI recommends their tape for this purpose but several people had negative things to say about the tape. On the recommendation of another enthusiast, I sealed the edges with RTV. I used loctite grey #5699 ASIN B0794BYCZ2. The pressurized container works in any orientation and made it easy to apply a consistent bead. Mask along your seams so you get straight, tidy edges. Again if you work slowly and deliberately, you can get good results. I worked in the silicone with a finger and wore heavy Venom Steel nitrile gloves to keep the chemicals off/out of my body (ASIN B00Y2OFGMW). Good Luck!

I put this on my Trans pan for my Silverado due to the exhaust crossing over it and it helps block the heat from build up in the fluid pan. Very flexible and easy to place on my pan.

This is high quality heatshield material. It has very good adhesion so make sure you place it correctly before removing the backing. It was a little hard to separate the backing at a corner. I placed the cut piece in place and then rolled with a roller to fit the heatshield to the structure before removing the backing. Beware of Amazon so called "heatshields" as they are just aluminum with adhesive, this is the real thing.

I used this to insulate the inside of the dog house engine cover in my old van. It made a night and day difference on the amount of heat and noise coming through! I would definitely recommend this to anybody looking for a heat barrier. I have not put any covering on the exterior of it and it is barely warm to the touch on the hottest day with the engine running at full temperature.

Used pop rivets and washer to attach it to my floor above a set of long tube headers. It came out beautiful, almost OEM looking. I held a propane touch to one side and it didn’t effect it, and transferred almost no heat. I wish I would have found this stuff years ago

I am using this product to protect nylon motorcycle bags sitting in contact with an exposed motorcycle exhaust, so I needed something that could handle direct contact, not just reflected heat. This shield is meeting my needs.The adhesive backing of the shield seems to be adhering well to the neoprene pad on the bag. In testing, the exhaust becomes far too hot to touch, while the neoprene pad and the bag itself become only slightly warm, so I'm confident there will be no meltdown during my upcoming road trip.The sturdy shield material can be cut to size with a heavy-duty pair of scissors, and is flexible enough to shape without distorting at freeway speeds.I would recommend taping the cut edges of the heat shield with aluminum exhaust tape for a little more finished look and keep water from getting into the insulation.

Very good quality good stuff

Good quality. Easy to use. Can mold into intricate shapes to heat shield my ecu and battery.

Great product. Will definitely Buy again.

cut with either a really sharp knife... and good tin snipssort of fits anywhere, seems to stick well. 1/4 of kevlar paddingseems perfect !!

Great product