Latest tape update... I've tried some 19mm 4289 on 30mm ID rims but couldn't get one rim / tyre to seal due to a big dent in the rim from a massive kerb case. I think the tape wasn't sealing over the dent. I ended up running a tube to allow me to ride the wheel.
I've just ordered some more 30mm wide 4289 from Viking tapes in UK (who will cut to the width you want). £10 for 60m inc delivery. I'm hoping that I can seal between the tape and tyre bead (similar to split tube tubeless which I used for years with great results) rather than tape, rim and bead. Which will eliminate one place for leaks to occur (tape / rim junction).
My end goal is to be able to tape up rims once and get multiple tyre changes out of one set of tape. With 3 sets of wheels over 2 bikes it's a PITA having to retape every time I change tyres which I had to do with Gorilla tape. At least 4289 is much cheaper than 25mm Gorilla tape (£10 for 60m cf £10 for 10m) and less messy re residue.