- What is SPF? SPF stands for Sun Protection Factor. It
indicates how much longer you can stay in the sun after applying
sunblock. This is based off of your self-protection time, which
is how long you can be in the sun without protection and not get
burned. (For example, if your self-protection time is 20 minutes
and the SPF of your lotion is 4, you can stay in the sun for a
maximum of 80 minutes. A fully protective sun lotion has an SPF
of over 20.) - When do I need to apply sunscreen? Always apply
sunscreen liberally before going outside. You can get sunburned
even on cloudy days or in wintertime. You need to apply sunblock
at least 15 to 20 minutes before going out in the sun. Remember
to reapply sunscreen every 2 to 3 hours, and after swimming,
perspiring, and towel-drying. - How much sunscreen is enough?
For adequate protection, you need to be using at least 2
tablespoons (or a shot glass) to cover your body. It is also
recommended to use a teaspoon full for your face (remember to
get your ears and any e