Just thought I'd share my first experience of running tubeless for sub 40K around Kent last weekend:
sub 40K
There's your issue. Needs to be 60k around Kent.
So it didn't seal but did you try dynaplug or anchovies?
@monkdagola started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
Just thought I'd share my first experience of running tubeless for sub 40K around Kent last weekend:

