mr_mills
Kendas have very porous sidewalls, they can take a long time and lots of effort to seal fully. They're also not the tightest tyres on a rim, so might be worth building a couple of layers of insulation tape, or even rim tape, on the rim before putting the rim strip on again.
This was my problem though. To put more sealant in meant letting the air out, which meant the bead came away from the rim. So – rim strip ruined and back to square one!
Right, there is a crafty solution to this…
Go down halfords, buy yourself a valve core remover. Also buy yourself either a syringe, or a squeezy bottle with a small enough nozzle to fint inside a Schraeder valve. Simply unscrew the valve core from the valve, and inject some more sealant in! Put valve core back in, pump tyre back up, and hey presto… You've got a load more sealant in, but you never had to break the seal of the tyre and rimstrip to do it.
I had to put more sealant in my Kendas twice in the end, and spin em up, ride em down the road, leave overnight then repeat etc. Finally sealed though, and worth the hassle IMO.