Replacement for a neoprene gasket

[drax]

My company currently uses a tubular .75&quot; neoprene door gasket to seal a heavy duty submersible enclosure. However, over the years (I'm seen some as few as 1) the gasket develops a groove left from the door edge. Because of the weight of the door when open, it hardly ever falls back into the depressed indentation causing the door not to seal properly. Is there a better material that will not leave a permenant groove?<br>
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Thanks for any help on this subject.<br>

 

[andyhodgkinson]

There are materials that have a higher shore durometer that are non memory forming. If you're having trouble with your enclosure leaking over time, it may do to find a thicker, softer material. The compression ratio will be higher and even if there is some memory, it will generally compress pat the memory point.

 

[DrZarkov]

You should investigate a high performance polyether (not polyester, water breaks it down) base urethane. These have superior compression set/recovery properties to the conventional synthetic rubbers. They are also more resistant to &quot;nibbling&quot; if trapped in small clearance spaces. The Navy is switching over to them for all kinds of pressure boundary sealing applications.