When to Replace Mascara: Complete Expiration Guide
Last Updated: 2026-01-04
Quick Answer
Replace mascara every:
- All mascara types: 3 months after opening
How to Tell If Your Mascara Is Expired
1. Visual Signs
- Formula becomes dry or clumpy
- Flaking on lashes
- Change in consistency
2. Smell Test
- Strong chemical smell
- Unusual or off odor
3. Texture Changes
- Dried out formula
- Clumpy texture
- Separated formula
4. Performance Issues
- Causes eye irritation or redness
- Doesn't coat lashes evenly
- Clumps on lashes
- Causes eyes to water
Why Mascara Expires
Bacterial Contamination
The eye area is highly susceptible to infection. Each time you use mascara, bacteria can transfer from your lashes to the wand and into the tube.
Air Exposure
Pumping the wand pushes air into the tube, which dries out the formula and introduces bacteria.
High Risk Product
Mascara is one of the highest risk cosmetics because it's used near the eyes, where infections can be serious.
The Hidden Cost of Expired Mascara
Health Risks:
- Eye infections (conjunctivitis, styes)
- Corneal abrasions from dried formula
- Serious infections requiring medical treatment
- Allergic reactions around sensitive eye area
Note: These risks are why it's crucial to replace mascara regularly and watch for expiration signs.
Never Lose Track Again
ProjectPan Journey automatically tracks your open dates and alerts you before mascara expires.
How to Extend Shelf Life
While you can't stop mascara from expiring, these tips can help maximize its lifespan:
- Never pump the wand (pushes air and bacteria in)
- Swirl the wand instead to coat it
- Don't add water or solution to dried mascara
- Replace immediately if you get an eye infection
- Keep away from heat
- Close tightly after each use
Replacement Schedule Recommendations
Every 3 months:
- All mascaras (non-negotiable for eye safety)
Use ProjectPan Journey to set custom reminders based on your specific products and PAO symbols.
Frequently Asked Questions
Can I use mascara past its expiration date?
It's not recommended. The PAO (Period After Opening) symbol on packaging indicates when mascara is most effective and safe. After this period, the formula may harbor bacteria, lose effectiveness, or cause skin reactions. When in doubt, throw it out.
How do I read the PAO symbol?
The PAO symbol looks like an open jar with a number and "M" (for months). For example, "12M" means the product should be used within 12 months after opening. This countdown starts when you first open and use the product, not when you purchase it.
Does unopened mascara expire?
Yes, even unopened products have a shelf life, typically 2-3 years from manufacture date. Look for a small jar icon without a number or a batch code. Once opened, the PAO period applies. Store unopened mascara in a cool, dark place.
What if my mascara expired but looks fine?
Replace it anyway. Mascara is especially risky near your eyes. Even if it looks fine, bacteria can be present and cause serious infections. The expiration date exists for safety, not just quality.