Can you still use last summer’s sunscreen, or should you replace it before going outside? Check the printed expiration date first. If the date has passed, discard the product. If there is no expiration date, the U.S. Food and Drug Administration (FDA) says to treat sunscreen as expired three years after purchase; when you do not know how old it is, discard it. Even within that period, sunscreen that has been exposed to excessive heat or has visibly changed deserves caution. This guide shows you how to make that decision without guessing or relying on an invented product test.
Quick answer: keep or replace?
Replace the sunscreen if its printed expiration date has passed, if it has no date and was bought more than three years ago, or if you cannot tell when you purchased it. Also replace a bottle showing separation, an abnormal smell or other noticeable changes. Consider retaining it only if its expiration and storage history are satisfactory, the product shows no signs of deterioration, and you can follow its label directions. If you cannot confirm its condition, replace it rather than assume protection. These checks cannot independently verify a product’s laboratory-measured SPF.
1. Read the expiration date before judging the packaging
Look on the bottle, carton, tube crimp or label for the manufacturer’s expiration date. Do not treat a product as safe simply because the cap still closes or the tube looks clean. The FDA advises against using sunscreen past the marked date, because it may no longer provide the protection stated on the label.
No printed expiration date? FDA rules allow an exception when the manufacturer has stability evidence showing a product remains stable for at least three years. For a sunscreen without a printed expiration date, the practical consumer rule is to consider it expired three years after purchase. This is not three years after you opened it and not three years after you found it in a drawer. If you cannot establish when you bought it, the FDA advises discarding it.
2. Look for warning signs of a product that has changed
Expiration is only one part of the decision. The American Academy of Dermatology (AAD) recommends replacing sunscreen if you notice an obvious change in color, an unusual or foul smell, separation into layers, or an unusually dry or flaky consistency. A product may deteriorate before its printed date, especially after heat exposure. Do not use smell or texture to prove that a sunscreen is still effective: a normal-looking formula does not replace an expiry and storage check.
3. Heat and storage: the car is not a safe sunscreen cabinet
The FDA advises protecting sunscreen containers from direct sunlight and excessive heat. For long outdoor days, keep a sunscreen bottle in the shade or wrap it in a towel rather than leaving it in direct sun. A hot car is a poor long-term storage place. AAD explains that heat can speed up breakdown of ingredients, even before the expiration date.
These are product-care instructions, not a claim that this publication measured the temperature of a vehicle or laboratory-tested a sunscreen after heat exposure. If a product was stored under questionable conditions and you cannot establish that it remains suitable, choosing a fresh, properly stored bottle is the cautious option.
4. Five sunscreen keep-or-replace scenarios
| What you find | Recommended next action | Why |
|---|---|---|
| Printed expiration date has passed | Replace it. | FDA advises not to use expired sunscreen. |
| No printed date; you bought it more than three years ago | Replace it. | FDA’s three-year purchase rule applies. |
| No date and no reliable purchase record | Discard it. | Age cannot be verified. |
| Date appears valid, but color, odor, separation or texture changed | Replace it. | AAD describes these as signs the sunscreen may no longer be good. |
| Date valid, appearance unchanged, but prolonged excessive heat is suspected | Review the manufacturer’s storage guidance; when uncertain, replace. | Heat may compromise the formula before expiry. |
5. A repeatable five-minute sunscreen inventory
How to use this checklist: You only need the label, a purchase record if available, and your own observations. Write down what is known and what is uncertain. If any important information is missing, do not treat a normal smell or appearance as proof that the stated SPF remains effective. You cannot verify sunscreen performance with a home visual check.
Reader exercise, not a firsthand field test: Use this single bottle-by-bottle log. An absent expiration date and an unreadable date are not the same evidence situation; do not assume a rubbed-off date means the manufacturer deliberately omitted it. If you cannot reliably establish an expiration or purchase history, do not estimate the missing date from the bottle’s appearance.
| Record this | Your bottle’s evidence | Decision if unknown |
|---|---|---|
| Exact product and Drug Facts label | Product/variant: ____; photo of label: ____ | Confirm identity before comparing |
| Date type | Printed expiry / no expiry printed / marking unreadable: ____ | Do not reclassify unreadable as absent |
| Verified purchase date, if no expiry printed | Receipt or reliable record: ____ | Replace if purchase age cannot be established |
| Storage and condition | Heat exposure, color, smell, separation: ____ | Do not treat normal appearance as an SPF test |
| Action and reason | Keep / replace / ask manufacturer: ____; date: ____ | Prioritize a fresh, properly stored product when uncertainty remains |
For a new bottle without a printed date, write its purchase date on the container and keep a receipt if practical. Photograph the Drug Facts and expiration marking before disposing of an old bottle if you need a reliable comparison next time.
Illustrative comparison: Bottle A was purchased in January 2024, has no printed expiration date and has been stored according to the label. In October 2026, it is not yet three years from purchase, though you still need to check its condition and manufacturer directions. Bottle B has no printed date and an unknown purchase history. FDA guidance points to discarding Bottle B, even if it looks fine. Neither bottle is a real product tested or endorsed by this publication.
6. Replacing a bottle? Check the new label, too
When shopping for a replacement, the AAD recommends broad-spectrum protection, SPF 30 or higher and water resistance when appropriate. Follow the product’s actual directions and reapply during outdoor exposure as directed, including after swimming or sweating. Sunscreen complements shade and protective clothing; it is not a reason to extend sun exposure indefinitely.
For more help, see our sunscreen Drug Facts comparison guide, Warnings and Directions label audit and 2026 FDA sunscreen rule-status guide. Begin with the Start Here decision desk if you want a broader product-choice framework.
Who prepared this guide, and how?
This independent Radiant Years Guide editorial resource was prepared by comparing the original FDA sunscreen expiration guidance with AAD advice about product condition and sunscreen labels. The decision table and five-minute inventory are our own educational organization of that information, not results of laboratory testing, product purchases or a dermatologist consultation. We have not tested sunscreen stability or measured SPF. If the manufacturer’s instructions differ for your particular product, follow its label or contact the manufacturer. See About for the publisher’s identity, Editorial Policy for how sources and examples are handled, and Contact to request a correction.
Sources and editorial limitations
- U.S. Food and Drug Administration — Sunscreen: How to Help Protect Your Skin from the Sun (expiration dates and heat storage).
- American Academy of Dermatology — When to Toss Your Makeup and Sunscreen (visible deterioration and heat).
- American Academy of Dermatology — How to Decode a Sunscreen Label (SPF and water-resistance labels).
Editorial review: October 29, 2026. This is independent educational guidance for U.S. readers, not medical diagnosis or a claim of firsthand sunscreen testing. The comparison bottles are fictional. Check the product’s own directions; seek qualified advice for medical concerns. No product sponsorship or affiliate recommendation is included.