I think that is the stuff that you can get at the big box stores like Home Depot or maybe Lowes. I used some of it once to jury rig a 90 degree 8" pvc pipe elbow that did not fit properly. Not really to seal it other than mostly to keep it in place and cover a gap while I poured concrete around the whole joint in a non-pressure drain application.
The stuff I had was thin and really flexible. I think it was available in a couple different widths.
This was the project I used it on but I did not get a picture of the tape in use so probably not useful.
But here it is anyway. 
