That must have been one high UV index!
Sunscreen is generally divided into two types, physical and chemical. Physical sunscreens protect your skin from the sun by deflecting/blocking the sun's rays. This is what is known as sunblock. Chemical sunscreens work by absorbing the sun's rays. They are known as sunscreens. Chemical filters offer more coverage against UVA and UVB rays than physical sunscreens.
You may want to look for a product with both physical and chemical protections if you're burning with an SPF 60.
Physical sunscreens include titanium dioxide and zinc oxide. Chemical sunscreens include octylcrylene, avobenzone, octinoxate, octisalate, oxybenzone, homosalate, 4-MBC, Mexoryl SX and XL, Tinosorb S and M, Uvinul T 150, Uvinul A Plus. (Though I believe Mexoryl isn't available in the US, while it is in Canada.) You can check the "active ingredients" on labels to see what the UV filter being used is.
Here's a short article on how to apply it properly (from
http://cancer.about.com/od/skincancerprevention/ht/applysunscreen.htm ):
Many people apply sunscreen the wrong way. Learn how to maximize your sun protection by applying sunscreen properly.
Difficulty: Easy
Time Required: 5 minutes
Here's How:
1. Fifteen to 30 minutes prior to going outdoors, apply sunscreen to areas of the body that will be exposed to the sun. You need to give the product time to be absorbed into the skin.
2. Enlist the help of a friend to apply sunscreen to the areas of the body that you may not be able to reach like the back.
3. Don't forget to apply sunscreen to areas that are commonly neglected, like the ears, face, hands, neck, and feet.
4. Every two hours, reapply sunscreen. Reapply after going into the water, even if sunscreen is "waterproof" or "water resistant." Waterproof and water-resistant sunscreens only offer 40 to 80 minutes of protection. It is essential to read the sunscreen label for exact times because every manufacturer is different.