What You Should Know, and Why SUNMUD Is Different?
The short answer is: yes, most sunscreens do expire. But not all sunscreen products are created equally, and SUNMUD is proud to be different.
Why Does Sunscreen Have an Expiration Date?
Most conventional sunscreens use chemical UV filters like oxybenzone, avobenzone, or octinoxate. These ingredients are known to break down over time, especially when exposed to light, heat, and air; three things that are almost unavoidable when you're applying sunscreen outdoors(US Food and Drug Administration).
As the active ingredients degrade, the sunscreen becomes less effective, which means less protection against harmful UV rays. That’s why the FDA requires expiration dates on all sunscreen products: to help consumers avoid using products that may no longer work as intended.
What About Mineral-Based Sunscreens?
Mineral sunscreens, which use ingredients like zinc oxide and titanium dioxide, are generally more stable. However, many still contain water, emulsifiers, oils, and preservatives that can separate or spoil over time, especially in high heat or humidity(American Academy of Dermatology Association). The product might still provide some UV protection, but changes in texture, smell, or consistency are signs it’s past its prime, and could lead to uneven application or reduced comfort.
How SUNMUD Is Different?
SUNMUD is formulated without water, synthetic preservatives, or chemical UV filters. That makes a big difference in shelf stability. Our mineral-based, oil-rich formula is carefully crafted to maintain its integrity over time, as long as it's stored properly. There are no fragile emulsions or volatile ingredients that tend to break down in traditional sunscreens. This allows SUNMUD to stay effective, smooth, and consistent without relying on artificial stabilizers.
So, Does SUNMUD Expire?
Technically, yes we include a recommended use-by date, just like other sun care products per the regulatory requirements. SUNMUD has passed stability testing up to two years, which is the maximum self life allowable for a skincare product. This helps maintain consumer confidence and ensures compliance with cosmetic labeling regulations. But unlike many conventional sunscreens, SUNMUD doesn’t rely on ingredients that rapidly degrade, meaning that under normal storage conditions, it may remain effective longer than the two year window verified via testing.
Bottom Line
Yes, sunscreen expires. And for most products, it’s a serious concern. But SUNMUD is built differently. With no water, no chemical actives, and no unnecessary fillers, our formula is designed to last. That said, we always recommend keeping your jar in a cool, dry place and using it regularly, not only to stay protected, but to get the most from your skincare routine because sun care should feel good, work well, and never go to waste.
