Vulcanized O-Rings Vs One piece molded O-rings 2

Is this for a static or dynamic seal?

Dynamic application. Also, have you encountered vulcanized O-ring failures in static applications before?

I've glued some o-rings in the past but I avoid the process now. However, even with vulcanization it seems that o-ring splicers suggest or strongly state their products are acceptable for static applications only.

This one says ok for static:


This one says must not use for dynamic:

I have used them before in prototype quantities for a static, low pressure application.

I would trust the manufacturer to do a much better job than I can in house with one of those vulcanizing kits. I would not trust them for a dynamic application. If you really need a custom size, get a custom molded solution. Still cheap, still fast.

Thanks to everyone for your responses. I value your input.