Thermo-Tec 13575 Adhesive Backed Aluminized Heat Barrier, 12″ x 24″

Why only 4 stars?Product works well (as listed in “story” below), but the adhesive after 3 months isn’t holding up so great. When I remove the battery cover I applied this too I often times have to re-stick the heat shield. Considering it’s a smooth plastic and I bought the cover brand new so it had no time to be exposed to road dirt, and considering this item never gets wet or is exposed to anything but vehicle heat I’m removing a star. It’s designed to block radiant heat, but what’s the use if the adhesion can’t handle the heat?Story:Used this on the battery shield for my wife’s 2002 Saab 9-3. After 3 failed batteries in 1 1/2 year I realized that the battery was too close to the radiator hoses and it was making the battery almost 200 degrees. I bought the factory shield that covers the battery (a number of years ago a mechanic took it off and never replaced it), I had no idea how important it was to keep the battery from becoming super heated. As added insurance I covered the cover with this material. This sheet was the perfect size to cover every side (4 sides and top) of the square battery cover. Now the battery has an average temperature of 114 degrees after a 30 minute drive. I should note I live in Florida, bare pavement is 114 degrees most days, so I think that’s about as cool as the battery can get unless I relocate it to the trunk.

This stuff is great.I just ordered one more package of it to (which will total four packages) complete the job of insulating my fuel tank against heat here in the Arizona desert. So far it has really worked. On my 1985 Mazda RX7 GSL-SE, the factory somehow thought it smart to have the fuel tank under the car and right next to the exhaust!. Not so good. So, in very hot weather, the fuel would actually boil in the tank. I mean really boil. In 100 degree+ weather when I’d go to get gas, when I took off the fuel cap it would literally blow off and gush a gallon or so of fuel out at me and on the ground. You’d hear the remaining fuel bubbling and boiling to the point you couldn’t put more fuel in until it settled down. Also, I would get stuck (vapor lock) on occasion. It’s been over 100+ degrees every day since I covered the tank with this and, so far, no more boiling and bubbling. It works exactly as advertised. I’m ordering one more sheet as the three packages were not quite enough to completely cover the tank areas I needed to, but more for appearance than function since you can see the tank from behind the car.It just plain seems to work. Not cheap, but so far worth every penny. I haven’t needed to cover the top of the tank, just the bottom and sides so, as in my case where the tank is out in the open, you should be able to do the job without dropping the tank off the car. IMPORTANT: Be sure you clean the surfaces where you’re going to stick the adhesive backing of the material very well before sticking it on. Otherwise it won’t attach well over grease/oil. Also, the adhesive backing is VERY sticky, so measure and plan out where you’re going to attach it before you take off the clear plastic sheeting that covers the adhesive. Otherwise it may stick where you don’t want it too.