How to Replace the AeroPress Steel Seal
By AeroPress Coffee Makers | The French Press Alternative | Published: 2026-10-29
Category: How-to Guides
Learn when and how to replace the AeroPress Steel Seal on your AeroPress Steel coffee maker. Simple steps to restore a proper seal and keep brewing performance consistent.
Quick answer
To replace the AeroPress Steel Seal, remove the old plunger seal, clean the plunger, and press the new food-grade silicone seal into place. Do this when you notice air escaping or resistance dropping during pressing.
Why the seal matters
The AeroPress Steel Seal is the rubber ring on the plunger that creates an airtight fit against the chamber. When it wears out, you might see coffee grounds in your cup or feel less resistance when pressing. Replacing it restores the original pressing performance and keeps your brew consistent.
When to replace the seal
There’s no fixed schedule, but check the seal every few months. If it looks cracked, deformed, or feels loose, it’s time to swap it. Also replace it if you notice a drop in pressure or if water leaks around the plunger when pressing.
Steps to replace the seal
- Remove the old seal: Pull the plunger out of the chamber. Grip the old seal and slide it off the plunger end. If it’s stuck, gently roll it off with your fingers. Check if the old seal is cracked or deformed—that confirms replacement was needed.
- Clean the plunger: Wash the plunger with warm soapy water and dry it completely. Make sure there’s no old coffee residue or oil on the surface. A clean plunger helps the new seal seat properly and prevents slipping.
- Install the new seal: Slide the new AeroPress Steel Seal over the end of the plunger and press it into the groove until it sits evenly all around. Run your finger around the seal to ensure it’s fully seated and not twisted.
- Test the seal: Insert the plunger into the chamber and press down without coffee. You should feel consistent resistance with no air escaping around the seal. If you still feel air leaks, remove and reseat the seal; don't force it.
Product facts
- AeroPress Steel Seal: The AeroPress Steel Seal is made from food-grade, LFGB-grade silicone and is designed specifically for the AeroPress Steel coffee maker. Food-grade silicone ensures safe contact with your coffee, and the precise fit helps maintain a proper seal during brewing.
AeroPress Steel Seal
