I have visited several articles (also z. B. the isolation of tesa) and the reviews were mostly one thing, then that way. Often complained the buyer breaks and cracks of the insulation mat or a difficult attachment behind the heater. All of these things I can not confirm at this product. The "mat" is relatively resistant (should you bend something obviously never - of course). The attachment of the mat, while providing something tüftelm, but that will be in every way, because this problem is more likely at the position of the radiator. We the mat have always attached with double-sided tape on the wall and cut to the length of the radiator. We were able to fully utilize the film for three radiators (width 120cm). Whether the insulation really works, you will see over time. You made a very good impression to the good reasonable price - so 5 stars.