Why do sparklers stay lit underwater?

It might seem impossible, but yes—some sparklers can stay lit underwater! The secret lies in the ingredients. Sparklers are made with chemicals that include an oxidizer, such as potassium nitrate, which provides the oxygen needed for the sparkler to burn. Unlike a candle that needs oxygen from the air, sparklers carry their own oxygen inside the chemical mix. That’s why they can keep burning even when submerged.

However, not all sparklers behave this way. Standard wedding sparklers—like the ones from Wedding Day Sparklers—are designed for open-air use during events like grand exits or photo sessions. Underwater sparklers are a more scientific or specialty item, often used in demonstrations, not celebrations.

So while it’s a fun science fact, it’s best to keep your sparklers dry and safe. Want a show-stopping moment on land? That’s where Wedding Day Sparklers truly shine!

Stay bright, stay safe, and light up your moments the right way.