[mdp]

Been using tubliss for years no problems, last front I fitted (Michelin enduro medium 80/100) just would not seal despite repeated attempts.
Put some mtb sealant in, as I had some, and sealed up perfectly, been fine ever since

 

[slugger]

I tip whatever I’m putting in the tyre - slime/soapy water in before I fit the last side onto the rim. Just stand the wheel up. Pull bead away from rim. Pour in 200ml or so. Fit final final side. Do the 360 degree bounce on the tyre vertical thing and then pressurise everything. Not failed me so far. Easier than messing with the valve core and no chance of threads or granules getting in the valve as the air going in keeps it clear.

I do exactly same ....then put 30psi in and leave to seal ....I use XT754 at 6psi and it'll hold at 6 no problem .....I think the key is ...shitloads of soapy water and high pressure for a few days to seal .....I used to fit tyre and set it at the riding pressure... they always leaked

 

[sidecarbod]

Update from my side.

I decided to go with slime, I ran a smear of the stuff on both sides of the red liner, I then fitted the tyre and ran another smear on both beads of the tyre, I did not use very much, just enough to make the red liner slippy and the tyre's beads slippy. I inflated the bladder to 100 PSI and tyre to 30 PSI, I tested for leaks using a container full of water and it's totally sealed!

I must admit that I was not happy with the thought of water slopping around inside my wheel, using this method there was no water involved at all apart from testing for leaks.

 

[steveman]

I do exactly same ....then put 30psi in and leave to seal ....I use XT754 at 6psi and it'll hold at 6 no problem .....I think the key is ...shitloads of soapy water and high pressure for a few days to seal .....I used to fit tyre and set it at the riding pressure... they always leaked

Strange, I never ever manged to get the 754 tight. Guess I must give it another try once I am fit again and the fucking snow is gone...