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There are hundreds if not thousands of various compounds used for the purposes of gasket creation. One of the reasons for all of the variants hinges on the type of substrate or surface the gasket needs to attach to. Even the degree of attachment to the substrate is often manipulated: it is often necessary to have a gasket stick well enough to withstand normal use but yet unpeel from the substrate so that the part can be reprocessed in the event that an improper gasket is formed. And of course a gasket that sticks well on ABS simply may not stick adequately on glass filled nylon, let alone polypropylene.
To follow a theme seen throughout this site, it is important to evaluate your particular situation for suitability to purpose before launching into production!
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