5mm 48Inch x 10Ft Reflective Insulation Roll, Double-Sided Aluminum Foil Insulation Sheet, Reflective Window Insulation for Soundproof – Widely Used in RV, Garage, Wall, Attic, Roof, etc.

bought a roll to use as a DIY car window cover for the inside of the car. made a cardboard template for the different windows, traced it onto the foil, cut and covered one side with black ducktape (using spray adhesive and black fabric might have been better but no regrets). I was able to cover my front and rear windshields as well as my front and back driver and passenger windows with some to spare. rolls up easy and springs back, holds well and keeps the car cooler than without it

Used it on my R V ac for insulation and it made a great difference.

I bought the same product twice and they came the same, then I bought it a third time and it came different and seemed like an inferior product. I will not return it because it took too long to deliver.

Worked great to add insulation to my garage door. It took 3 rolls to do a 7'×16' garage door. It worked nicely because each panel is not exactly the same size. Measured each panel and easily cuts with a razor knife can really tell the difference in the garage. GREAT PRODUCT for my application.

I used this insulation to insulate a cat house. It is a nice thickness for that and it works well.

This is great insulation. It’s dirty and the 5 mm really helps. I would definitely buy it again. Hopefully it goes on sale because it is 40 bucks.