Dicor Di-seal sealing tape. Is it as good as eternabond?

You should not worry about the Dicor product. I have used their patch kit and it worked well. Their tape should be just as good . Afterall, they make rubber roof material so their repair products should be as good.
Agree also that here people seem to be locked in to Eternabond but there are other products just as good and when you need it now it is not convenient to have to order some and wait while another product is available locally.