Sunscreen and Insect Repellent: Which Goes On First?
Affiliate links below, but they cost you nothing extra. We only point you to what the ingredient lists actually back up.
It’s the night before a camping trip and there are two bottles on the counter. One is your sunscreen. The other is bug spray. Tomorrow they’re both going on the same arm, and you have about three seconds to decide which one goes on first. Good news: sunscreen and insect repellent is one of the rare skincare pairings where the health agencies don’t disagree at all.
The short version: sunscreen first, then the repellent on top. That’s what the CDC[1], the American Academy of Pediatrics[2] and the National Pesticide Information Center[4] all say. The catch is that it costs you something: the CDC writes that limited data show a DEET repellent applied over sunscreen cuts the SPF by one third, so you might need to reapply your sunscreen more often than usual.[1] And all of them say to skip the bottles that combine both.
The order the sources give
Sunscreen goes on first. Repellent goes on second. Nobody we read puts it the other way around.
Here’s who says what, in their own words:
| Source | What it says about order |
|---|---|
| CDC Yellow Book (2026 edition) | “In general, travelers should use separate products, apply sunscreen first, and then apply the repellent.”[1] |
| American Academy of Pediatrics | “If using a separate sunscreen product, apply sunscreen first and insect repellent second.” This appears in the AAP’s tips for applying repellent to children.[2] |
| NPIC, citing the CDC | Apply “sunscreen first, letting it dry, and then applying an insect repellent over the sunscreen.”[4] |
| The Skin Cancer Foundation | “Apply sunscreen first, then an insect repellent, following the manufacturer’s instructions for each.”[5] |
The one extra instruction worth catching is the NPIC’s: let it dry.[4] None of these documents attaches a number of minutes to that, so we won’t invent one either. Dry to the touch, then spray.
What happens to my SPF when the repellent goes on top?
It goes down. How far down depends on which document you’re reading, and the two we found don’t say the same thing.
| Who wrote it | What they wrote |
|---|---|
| CDC Yellow Book[1] | “limited data show that DEET-containing insect repellents applied over sunscreen decrease the sun protection factor (SPF) of the sunscreen by one-third” |
| The Skin Cancer Foundation[5] | “In some studies, the combination led to a more than 30 percent reduction in SPF” |
Two different organizations, two different sentences, and neither one cites the other. They’re also describing slightly different situations: the CDC is specifically talking about repellent layered on top of sunscreen, while the Skin Cancer Foundation is talking about combining the two more generally. We’re not going to average them into one clean number for you, because that number wouldn’t come from anywhere.
What both of them support is the direction, and the direction is all you need to act on. The CDC spells out the consequence: “Because SPF decreases when a DEET-containing insect repellent is used, travelers might need to reapply sunscreen more frequently.”[1] So on a repellent day, your sunscreen schedule tightens up. If you want the practical version of doing that outdoors, see our guide to reapplying sunscreen on the go.
One more thing the CDC notes, and it’s the part people get backwards: the repellent isn’t the one that suffers. “Repellents applied according to label instructions can be used with sunscreen with no reduction in repellent activity.”[1] The bugs are still handled. It’s your sun protection that pays.
The two-in-one bottle is the one thing to skip
All four sources tell you not to buy the combined product. This is their recommendation, not ours, so here’s each of them saying it.
- CDC: “Travelers should avoid products that combine sunscreen with repellents because sunscreen might need to be reapplied more often and in larger amounts than what is needed for the repellent component to provide protection from biting insects.”[1]
- AAP: “Avoid products that combine repellents with sunscreen.”[2]
- AAD: “Sunscreen with insect repellant isn’t a product that the AAD recommends.” It tells you to buy and apply each product separately, “as sunscreens need to be applied generously and often; however, insect repellent should be used sparingly and much less frequently.”[3]
- NPIC: “The CDC does not recommend products that have both sunscreen and an insect repellent.”[4]
Where the CDC and the AAD give a reason, it is the schedule rather than the formula. That is the next section.
How do I plan a day that needs sunscreen and insect repellent?
Work out the two clocks before you leave, because they don’t line up. Sunscreen is the fast one. Repellent is the slow one.
The numbers each source gives:
| Product | How often, per the source |
|---|---|
| Sunscreen | Generously and often, per the AAD[3], and more often than usual once repellent is over it, per the CDC[1] |
| Repellent | “every two to six hours, depending on the concentration,” per the Skin Cancer Foundation[5] |
| DEET, by strength | The AAP writes that a 10% DEET product protects for about 2 hours, and a 30% one for about 5 hours[2] |
That gap is the entire problem. Reapply the combined bottle often enough for your skin, and you’re reapplying the repellent far more than it needs. Reapply it on the repellent’s schedule, and you’re wearing four-hour-old sunscreen at 2pm.
The fix is boring and it works: two bottles, two schedules, one alarm on your phone for the sunscreen. Your repellent’s label can tell you its own number, by the way. The EPA lets manufacturers put a graphic on skin-applied repellent labels “to communicate the repellency time for mosquitos and ticks,” and the products in its search tool are the ones registered with the agency.[6]
Two things we’re deliberately not doing here. We’re not telling you which repellent to buy, because that isn’t our subject. And we’re not going to restate how much sunscreen a day like this needs, because our how much sunscreen to apply guide already puts a number on it. If you’re heading somewhere with a high forecast on top of everything else, our UV index guide covers what that number does and doesn’t change.
Should I be putting repellent on my face?
The Skin Cancer Foundation says no: “you should avoid applying it to the face.”[5] The AAP’s advice for children is in the same spirit, telling parents never to spray repellent directly onto a child’s face and to rub it on with their hands instead.[2]
That’s genuinely useful for planning, because it splits your body in two. Your face is a sunscreen-only zone, so nothing there is taking the SPF hit the CDC describes, and you can top it up whenever you like. Your arms, legs and neck are the mixed zone, and that’s where the reapply clock gets strict.
Korean sunscreens that fit a bug spray day
Since the whole issue is that you’ll be reapplying more, we picked for one thing: can you actually put more on, outdoors, without a mirror or clean hands?
| Pick | Why it fits this day |
|---|---|
| MISSHA All-Around Safe Block Essence Sun | The big, cheap, unglamorous lotion people buy for arms and legs. Worth knowing before you commit: it’s rated SPF45 PA+++, a step under the SPF50+ PA++++ most newer Korean sunscreens print, and its ingredient list runs 51 items with fragrance last. We read the whole label in our Missha All Around Safe Block review.[7] |
| Beauty of Joseon Matte Sun Stick | A stick is the easiest format to reapply when your hands aren’t clean, because your fingers don’t have to touch the product at all. INCIDecoder shows both an alcohol-free and a fragrance and essential oil free flag on this one, across 48 ingredients.[8] |
| Round Lab Birch Juice Moisturizing Sunscreen | A plain, comfortable face cream for the zone where no repellent is going. Nothing clever, which is what you want on the one part of you that stays simple all day. |
If your day also involves water or a lot of sweat, the water resistance question is its own thing and we covered it in our water resistant Korean sunscreen guide. It’s a separate question from this one, and neither answer solves the other.
FAQ
Do I really have to put the sunscreen on first?
Yes, if you’re following the agencies. The CDC, the AAP, the NPIC and the Skin Cancer Foundation all print the same order: sunscreen, then repellent over it.[1][2][4][5] None of them describes the reverse order.
How long should I wait before I spray the repellent?
The NPIC says to let the sunscreen dry first, and then apply the repellent over it.[4] It doesn’t put a number of minutes on that, and neither does any other document we read for this piece, so treat “dry to the touch” as the instruction rather than a countdown.
Am I supposed to reapply the repellent every time I reapply my sunscreen?
No, and that mismatch is exactly why the agencies say to keep them in separate bottles. The Skin Cancer Foundation puts repellent at “every two to six hours, depending on the concentration,” while sunscreen is applied generously and often.[5][3] Follow each product’s own label.
Should I ever buy the combined sunscreen and insect repellent?
Not according to the four sources here, all of which recommend against combination products.[1][2][3][4] Their stated reason is the reapplication schedules, not the ingredients themselves.
Does the SPF drop apply to my picaridin repellent, or only to DEET?
The CDC sentence names DEET-containing repellents specifically, and we won’t stretch it further than that.[1] The NPIC writes that “the effects of using both depend on which sunscreen and which repellent is used,” and that few or no studies address using IR3535 or oil of lemon eucalyptus with sunscreens.[4] That’s a description of what has been studied, and it isn’t a verdict in either direction.
Sources
Agencies and organizations:
[1] CDC Yellow Book 2026, “Mosquitoes, Ticks, and Other Arthropods,” chapter authors C. Roxanne Connelly and John E. Gimnig, page dated Apr. 23, 2025. Source of the order, the one-third SPF figure, the “no reduction in repellent activity” line and the combination-product advice. link
[2] American Academy of Pediatrics, “Insect Repellents.” Tips for applying repellent to children, including the order, the combination-product advice, and the 10% and 30% DEET protection times. link
[3] American Academy of Dermatology, “Sunscreen FAQs.” The AAD’s position on sunscreens with repellent in them, and the generously-and-often versus sparingly contrast. link
[4] National Pesticide Information Center, “Insect Repellents” fact sheet. Source of the let-it-dry step, the CDC combination-product position as NPIC states it, and the line on which studies exist. link
[5] The Skin Cancer Foundation, “Ask the Expert: Which Is Better, a Combination Insect Repellent and Sunscreen or Separate Products?”, published July 14, 2022. Source of the “more than 30 percent” figure, the two-to-six-hour repellent window and the face advice. link
[6] US Environmental Protection Agency, “Find the Repellent that is Right for You.” Source of the repellency awareness graphic on labels and the registered-products search tool. link
Ingredient lists we read ourselves:
[7] INCIDecoder, Missha All-Around Safe Block Essence Sun SPF45 PA+++. Counted 51 ingredients with fragrance in last position; carries an alcohol-free flag. link
[8] INCIDecoder, Beauty of Joseon Matte Sun Stick. Counted 48 ingredients; carries alcohol-free and fragrance and essential oil free flags. link
