Maybe I was wrong about interior protectants

J

JBM

New member
I have long been skeptical about the claims that a little interior spray product could protect or offer protection against UV/UVB rays or radiation.

I will admit I am a cynic and tin foil hatter.

Someplace else it keeps coming up that a water based product is a water based product chemistry speaking wise, with some alterations to suit their desired characteristics.

The main ingredient in a water based rubber/vinyl product is PDMS or Poly(dimethylsiloxane).

I googled it to find out more about it and this is the info I found that may alter my opinion of the ability of these products to protect against UV rays.

Found here http://www.rubloffgroup.umd.edu/tea...es/current/publications_etc/pdh-735(pdms).pdf

PROPERTIES OF SPECIAL INTEREST
Thermal stability, low temperature performance and
minimal temperature effect. Good resistance to UV radiation.
Click to expand...

Just thought Id share.
 
The skeptic in me is unsure.

Does "good resistance to UV" mean:

A. The chemical itself is not degraded easily by UV radiation?

B. The chemical itself protects the surface/substrate from UV
radiation?

C. Both A & B.

Dunno. But if I had to guess - it would be "A.". The fact that the chemical itself is not easily degraded by UV radiation, does not inherently mean that any surface it`s applied on top of is protected from UV radiation.

For example, if I put a rubber hockey puck on the hood of my BMW, and proceed to beat the rubber hockey puck with a hammer - it`s very likely the rubber hockey puck will not be damaged. Therefore, I could say the rubber hockey puck has "good resistance to multiple impacts".

The hood below it? Prolly gonna have some dents....






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The best UV "protection"??
A garage-kept vehicle.
Laugh as you will at the above, plastics and rubber seals have UV protection chemically added to their formulation and they will degrade and gas-off (evaporate) over time. I believe in using a rubber-vinyl protectant, like Aerospace 303, on seals "helps", especially older vehicles of 5 years or more. It is one of the reasons I use it on regular basis. And because I live in the Upper Midwest, melted snows that form into ice from car heaters between the door jams and rear trunk or back hatches, the protectant on the seals acts as a release agent so they does not "freeze shut" as easily, especially when door jams are waxed with carnauba wax.

I can show you vehicles that have sat outside for most of their life here in the Upper Midwest, and after 8-10 years their window seals show signs of cracking, even in our not-so-UV/high heat-intense area. And maybe that`s the point: heat is a much more vinyl and rubber aging/degrading "enemy" than UV rays.
 
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