does this product add sunscreen protection to hair?

http://m.pureology.com/systems/colour-fanatic-hair-treatment-spray

How much longer does your color last?

I use it because I have curly hair and this product helps keep the frizz away. While it does not help hair color stay longer, it seems to support the health of my hair. The process of coloring my hair can damage it to a small degree, this helps to keep it healthy while not shortening the time between colorings. Hope this helps.

Is this spray used only for color treated hair? I have natural hair. Can I use this product before blowdry/straightening?

This product can be used on both natural and color treated hair. Use before blowdrying for faster drying. This spray also works well as a detangler, cutting lotion, and leave-in conditioner.