Peter, I got my roll from Screwfix in the UK currently 3.99GBP for 10m x 19mm.
It is the tape that satellite installers use for waterproofing the cables.
Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016
| 
