4 inch Instant-Seal Cap Upgrade (6 to 25 Gallon Stills)
Say goodbye to fussy flour paste with this 4 inch instant-sealing cap upgrade, sized for stills from 6 up to 25 gallons. It snugs down for a clean, leak-free seal every time you run.
There's nothing worse than a blowout halfway through a batch with your wash spilling out the sides. This cap takes that worry off the table. We fit it for you with lead-free solder and food-grade stainless steel.
- Fits 6 to 25 gallon stills
- Fast, secure seal with no paste
- Food-grade stainless construction
- Joined with lead-free solder
- Professionally installed
✓ Solid lead-free copper · ✓ Ships free anywhere in the U.S. · ✓ Backed by our 2-year guarantee
Good to know
A 4 inch instant-seal cap for 6 to 25 gallon copper stills replaces the old routine of mixing flour paste, packing the joint and hoping it holds. It snugs down to a clean, leak-free seal every time you run. It's one of the simplest upgrades you can make to a still, and you'll notice the difference on your first run.
What does a 4 inch instant-seal cap fix?
It takes the blowout off the table. Few things ruin a batch like a cap letting go halfway through a run and wash spilling down the sides of the pot. With a sealing cap, the joint is the same every time, so the only things left to adjust are the ones you actually want to change: heat, timing and cuts. You also skip the prep before a run and the scraping afterward.
- Sized for 6 to 25 gallon stills: a 4 inch cap for small and mid-size pots.
- No paste needed: a fast, secure seal every run.
- Food-grade stainless steel: a sturdy, clean build.
- Lead-free solder, professionally installed: we fit it for you.
Not sure your current still is a match? Send us your still's size and we'll help you sort it out. A dependable seal is good practice whether you're making distilled water, essential oils, fuel alcohol, or spirits under a federal (TTB) permit.