Block-IR for a 97% thermal imaging reduction?

Igrowhydro.com is where i found this stuff called Block-IR.

Has anyone heard of this stuff actually working? Ive seen videos where police have used thermal imaging to detect grow houses but does Block-IR actually work like it says it does?

heres the link to it. http://www.igrowhydro.com/detail.aspx?ID=4385

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oh yeah so i reread the section of my book Invisible Marijuana, it's a cool book worth pickin up, says to cover your windows with a black sheet (better to have blinds in front of it so it looks less suspisous)than a thick quilt preferably black or white to absorb/reflect as much ligh as possible than tape styrofoam together a couple inches bigger than the window than tape the styrofoam to the wall and cover with mylar or white plastic to reflect the UV. Turn your brightest/hottest light right next to the window at night and check for light leaks and heat.

I got a nice set of blinds from walmart that are perfect too they are white on one side so they look natural from the outside and black on the other and stop heat and uv rays from escaping meant for blocking out light for people who sleep during the day or something and not losing heat through the windows. If I'm right they say that they block out 97% of uv rays on them also. theyre like 25$..
http://www.youtube.com/watch?v=sudf5xDIhmM&feature=PlayList&p=F353951DD4C03330&playnext=1&playnext_from=PL&index=5