Wella has a product specifically for sun protection. It is called Bi Phase spray and is not oily and should serve your needs very effectively. Hope this helps...Jon.
Tia,
I do not mean to object to the above mentioned product, though it is sufficient for hair, is a hair related product and not specifically for scalp related UV protection. The Following site will show you a product that I have been using for years for this issue with great results. You have to be very careful in this area as any of the products today contain petroleum by products and can retard follicular activity. Also when using any type of on scalp product you must use a deep cleansing shampoo such as Nioxin and perhaps even a scalp moisturizer after this to ensure that no damage is done due to exposure or dehydration. http://www.sundition.com/shop/
Hope that helps...cheers
The Salon Jon is in does carry the Nioxen I mentioned