Sun UV effect?

[Tim UK 14]

Hi

I notice that here, if a car is left on a drive for a considerable time, that the material underneath that car tends to stay lighter than the area where the car is not sitting.

Is this due to the sun's UV effect?

I hope I have made this clear. Does the sun have an effect on certain materials - concrete, stone etc?

Thank you.

Tim

[Beth n Rod 1,279]

Not usually. The question I have is: Is there a coating on it that is UV sensitive? Some coatings/sealers have UV inhibitors that actually absorb sunlight. These exhibit a colorshift (turn darker) with exposure. Other UV inhibiting sealers actually refract the UV rays creating a glare.

Rod!~

[Tim UK 14]

Rod, hi,

The customer told me that the drive 'had been sealed', although tye, the customer had some doubts about the honesty of the drive layer in the first place - ie, was a selaer applied at all?

I guess we'll not know the answer to that one.

However, like I said, I think, there is a light area where a car (auto?) has been parked for some time. I have seen this quite a,ot, and really don't think that a sealer has been applied.

Thank you,

Tim.