Does this product block UV rays?
1887891
Doesn't claim to block UV rays. I don't think that it has UV rays. It is a short blue light wavelength and is used for seasonal affective disorder or (SAD). People who get depressed or have less energy during the winter months when there is less sunlight often use these to decrease the SAD symptoms. I use it in the winter months and like it a lot.
1066476
Yes... It isn't as tight with the UV filter on, but it does work... I just leave my filter on and it does fine... every once and awhile it will fall off, so be sure it is attached by the cord! :-).
881657
Yes. It is small enough that it blocks the sun and i scoot it a little more back so it doesnt block my side mirror. Have been using it daily and it does work for sure
979155
anything will block a UV ray. even a clear plastic lid will block the rays. I did an experiment in my microbiology lab where we exposed two plates with bacteria to UV light. One plate was covered by a clear plastic lid and the other was not. The bacteria on the exposed plate had no bacteria growth because it was killed by the UV, the plate covered by the clear plastic lid did have growth. The lid provided adequate UV protection even with the plastic being clear. As long as the rays are being interfered with by something, they cannot be absorbed, whether it be clear, opaque or solid.
1517691
I never tested it so I am assuming the UVB passed through since it is a thin plastic and I would have hoped the manufacture did test that. Also I felt it was safer to have a protective barrier between the water and the light tube just in case. UVB does pass though plastics and some glass but may be "diluted" or refracted and depending on the thickness and the clarity of the material it can be blocked completely. Also UVB does dissipate with distance so you need to read the details to ensure it is placed appropriately. Hope this helps....
416722
The specs say that is has UV protection however I am unsure how to tell exactly.
2035001
With this product, you can see out perfectly during the day, but no-one can see in. This product blocks 94% of the harmful ultraviolet rays and cools the interior.
1343329
I have no idea if they will block UV...Asking the wrong guy this time, sorry.....
15113
If the product does actually block 99% of UV rays as stated, then it should block the vast majority of fading from occurring. Any light can eventually fade color, especially if the item is in full direct sun the entire day. However, UV light is the primary cause of this fading. A product that blocks all but 1% of UV light from penetrating should greatly reduce fading. No product can block all fading of a product left in the light, and any fading that would occur would be minimal and take place over decades. If it's valuable art that you will keep forever, I'd make sure it's not in direct sun at all. If it's out of direct sun, then this product should keep it safe from reflected UV quite well. I installed this product to stop wood from fading, but haven't had it on long enough to know if it actually works. I'm just speaking from the general science end of things. Hope this helps some.
1792780
Yes, it does, & it's pretty good, too! I went to the dermatologist after using this product daily for over a year, & she could tell that I was using sunscreen...something I didn't start using until my mid 30's, & only with this product. Enjoy! :)
120764
I cannot answer whether it actually blocks or what % UV blockage it provides as i do not have scientific equipment to determine that kind of information. However, it did give nice shade, allowed rain to filter through, and tolerated some very strong wind storms. I finally took it down for winter when the first snow arrived and it was holding snow.
1466624
Yes, they do block the sun like blue blockers and the wrap around works well. Definitely worth the purchase at such a great price. Since they are not made by "Blue Blockers", they may not want any legal issues if they advertise them as such.
1218946
Love it in the sun, need it in the rain! Yes, our JoeShade UV blocking umbrella also blocks the rain. It's a "Full Service" umbrella. Thanks for asking. "Stay Cool"
1365801
Yes.....it definitely helps in blocking out the sun.....it is also very durable. I love it!
274945
The clear UV Protection film does not block the heat, it only blocks the UV rays.
666636
While I agree with the other response that it does not stick all that well to the window (make sure you put the right side to the window), nevertheless I am grateful for it. I use it on my side windows and just stick it up into the window crevice. It is easy to put up and down. In this way I can have protection from the sun in the front and side. I have no idea if it blocks the UV rays; I just need blockage from the sun in my eyes while driving. I use it all the time.
1639421
I'm not sure about the actual UV Rays, but it does create great shade. We bought a nice color rope to tie it up with. We're very very happy with this cover. Janet