UV protection - Interior

Armor All is water-based.



Easy way to know is: If it's milky white it's water-based...if it's clear like water it's PD-based.
 
Alfisti said:
Good question. Your assumption is partly correct. Glass will filter UV out...but not 100%. It doesn't tranform it into anything - simply filters it. Its filtering capacity will depend on its thickness.



Some UV (a fraction) will get through to your dash, etc. That small amount can still damage your plastic, tan your arm, etc.



If it offered no filtering, your arm won't be tanned - it will be burnt.



So, to minimize the effect of the residual UV transmission, a dressing with UV absorbers helps.



So you'll be looking for a dressing (normally silicone) which is water-based and contains UV absorbers.



Hope this helps. :up
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Actually, more than a fraction gets through. Tinted windows help on the side and back glass but UV rays still gets through the windshield. It may not be 100%, but it's a lot.



New Lexus vehicles have windshields that filter out 99% of UVA/B rays. Other manufacturers may have started doing this, also.
 
mborner said:
Actually, more than a fraction gets through.
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I remember reading somewhere a windscreen filters about 80% and side-windows about 50% due its different thickness - or should it be thinness? ;)
 
Safety windshields do block some of the UV but it's true that much of the longer wavelengths do pass through. There are also those of us who like roadsters and convertibles. UV protection added to a dressing is a good thing IMO. It is also a good thing when applied via a sunscreen to people.



Ever go to any of those home window glass replacement showrooms? They have a UV lamp shining through various levels of HighE glass. Notice the heat behind these glass panes? UV does get through. Now you can be sure your auto glass is not HighE (unless you have a newer Lexus ? :)) so there is a fair amount of UV passthrough. It's the UV rays that are causing the heat. If your dash feels hot with the sunlight shining through the glass it is due to the UV rays. The UV part of the spectrum is where most of the heat energy comes from.



Fortunately the atmosphere (Ozone mostly) block about 98% of the UV rays striking the earth. Yet to the longer wavelength rays UVA and some UVB, the atmosphere is more transparent.



Learn more aboout the UV spectrum here.

Student's Guide - Ultraviolet Radiation



Can you tan through glass?

The Straight Dope: Can you tan through glass?



Finally, Wiki has a pretty detailled entry on the spectrum and it's effects.

Ultraviolet - Wikipedia, the free encyclopedia
 
jfelbab said:
UV protection added to a dressing is a good thing IMO.
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Absolutely...I didn't mean to imply otherwise. :up



jfelbab said:
It's the UV rays that are causing the heat. If your dash feels hot with the sunlight shining through the glass it is due to the UV rays. The UV part of the spectrum is where most of the heat energy comes from.
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I don't mean to sound :argue but this isn't correct. UV rays are cold and don't produce heat. The heat you feel from the sun, on the dash, etc, is the infra-red (IR) waves at the other end of the spectrum.



Glass that blocks 100% UV will still allow heating of surfaces unless it blocks IR as well. Most tint blocks a high ampont of UV and much (but not all) IR so the car heats up less. If you could get tint that blocks 100% IR then the car interior will never get hot.
 
I have a 2007 Mustang, and Transitions eyeglasses. I asked my eye doc why they don't get dark while driving, or even when left on dash or seat? His response is that almost all newer car glass have uv blockers. I still use 303 though.
 
I think heat is just as deadly as the sun here in Florida on interiors. It's like a darn oven in my wife's black minivan at times.
 
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