Mason jar seal - Ask Extension
Good Afternoon,
At the end of summer, I made some peach jam. All of the jars sealed. I accidentally left them on the kitchen counter during a heat wa...
Knowledgebase
Mason jar seal #923792
Asked January 20, 2026, 2:37 PM EST
Good Afternoon,
At the end of summer, I made some peach jam. All of the jars sealed. I accidentally left them on the kitchen counter during a heat wave. My husband thinks he heard some of the seals pop so he put them all in the refrigerator. When I checked them, none of the seals were broken.
Is it possible for a jar to lose its seal and then spontaneously seal again?
My husband is very concerned about botulism or any other possible foodborne illness.
Please advise.
Thank you!
Eagle County Colorado
Expert Response
Hello and thank you for reaching out to Ask Extension! To best help you with this inquiry, we recommend you contact your local county directly. The contact Information for Eagle County is
Phone:
<personal data hidden>
Email:
<personal data hidden>
Best of luck!
CSU Ask Extension Team
