Marty,
the electrical tape valve really works surprisingly well. It has kept stuff under vacuum for many months and costs next to nothing.
I think you should be fine if it's only 20-30 minutes....
Type: Posts; User: Schneiderlein
Marty,
the electrical tape valve really works surprisingly well. It has kept stuff under vacuum for many months and costs next to nothing.
I think you should be fine if it's only 20-30 minutes....
Marty,
I have stored silicone/mineral spirits in a mason jar that I pulled a vacuum on using a pretty powerful vacuum pump through a one-way valve made by punching a hole in the lid and covering...
I had the same thing happen on an old backpack I bought in '86 and kept in the attic for a long time. The fabric was gummy and stuck to itself in some places almost like it was welded. Must be the...