How to Apply Chem Free Sunscreen

Episode #211 / Jul 2, 2010
Chem free sunscreens are very effective at blocking the harmful UV rays of the sun. However, many people who try them don't use them after the first time because they claim they are too oily or don't rub in. This is only the case if you don't know how to properly apply them. In this episode of DermTV, Dr. Schultz explains why chem free sunscreens can be tricky to apply and how to properly put them on.
tom daley on July 2, 2010 at 4:33pm

How often do you have to reapply chem-free sunscreen?

Barbara on July 2, 2010 at 6:03pm

Thank you for this info! I have always applied the same amount of physical ss (chem. free) as I did of chemical sunscreen! This is going to increase the chem. free sunscreens that I can use on my face/neck because it will be more cosmetically elegant! It's nice to know I will still get the labeled SPF/protection by applying it properly!

alania on July 8, 2010 at 5:00am

yes,I would like to know too how ofter do I need to reapply chem-free SS?thank you

Karen on July 12, 2010 at 2:29am

How much sunscreen should I apply if it is a combination of chemical sunscreen (avobenzone-2%, ecamsule-3%, octocrylene-10%) and titanium dioxide (5%)?

Hayley on July 15, 2010 at 4:51am

Hi Dr. Neal Schultz,
Can sunscreens that have chemical and fisical UV filters, like Avène sunscreens in Europe, be applied like this (small amount) or it's just to cham free sunscreen?

Composition of an Avéne sunscreen:
- Avéne Thermal Spring Water
- MPI (ZnO + TiO2 micronized and coted)
- Tinosorb M + S
- Pretocopheryl

Neal Schultz, M.D. on July 15, 2010 at 7:08pm

@Tom: Chem free sunscreen needs to be reapplied just as often as traditional sunscreen: after you swim, after you sweat, and every three to four hours when not doing activities (because of insensible perspiration).

Neal Schultz, M.D. on August 2, 2010 at 9:38pm

@Karen: It depends if they are in different products or the same one. If in the same product, then apply the usual amount for a conventional chemical (non chem free) sunscreen. If in different products why use both? What are their respective SPF's? Please let me know. Thanks.

Neal Schultz, M.D. on August 2, 2010 at 9:51pm

@Hayley: Apply the usual amount for a conventional chemical (non chem free) sunscreen as long as there is no visible white residue. If there is a visible white residue, decrease the amount until you see no visible white residue after application.