teflon tape fills gaps very nicely, and molds itself into whatever
space is available. The rear-view mirror on my '84 car was loose,
rattling, and un-repairable, so I wrapped a bunch of teflon tape
around the base where it connects to the car. It took quite a bit of
tape, but it worked very well, no wobble.
On 12 /09/08 , at 02 /04/09, 11:44 AM, Britt Griswold wrote:
> The Smithsonian uses glass lids held in place with the traditional
> fruit canning mechanism: a rubber gasket and a pressure seal
> applied with the metal lever lock. Though the teflon covered
> threads sounds promising...
> Bruce Bartrug wrote:
>> Catherine Bursh wrote:
>> On the tape subject.... Anyone know the correct tape to use to
>> seal the
>> lids of specimen jars with alcohol in them? I'm tempted to use black
>> electrical tape but not sure if the alcohol fumes will mess with the
>> glue on the tape.
>> The purpose of the tape is to slow the evaporation that takes
>> place even
>> with a threaded top.
>> Catherine, I have two suggestions for you -- neither of which,
>> however, I've actually tested for the purpose you indicated.
>> The first is teflon plumbers' tape. Which is not really tape per
>> se (it has no adhesive) but is simply a thin film of a very inert
>> and useful material. One wraps the tape on the threads to be
>> sealed and tightens the lid. Very good at sealing the slightest
>> leaks, even in gas lines. I used it many decades ago to seal
>> brass joints in gas lines for chromatographs -- a instrument used
>> to analyse chemical substances. Try to find some wide enough to
>> fit the threads in question.
>> The second is a type of seal used to seal lids of packaged
>> chemicals. It's a circular sleeve of shrink-wrap type material
>> that one positions around a jar or bottle lid and then shrinks
>> with a hair-dryer.
>> As I said, I've not tested these specifically for the application
>> you've mentioned, but I strongly suspect using both would
>> significantly reduce alcohol evaporation from a speciman
>> container. I'm suspecting you're already using glass jars and
>> metal lids?
Gail W. Guth
Guth Illustration & Design
139 Lathrop Avenue
Battle Creek, MI 49014-5076