Since putting my Montreals on earlier the year the rear passenger side wheel has been losing air quite quickly - probably 10 psi every couple of weeks.

I think the wheel as probably corroded around the valve where i couldn't refurb it so it's leaking from there (one of the other wheels was losing 10psi a day when i first put them on for exactly the same reason)

However rather than getting it stripped down and fixed at my local friendly tyre place could i just get a can of flat-tyre-get-you home-puncture-repair-gunk which would seal it from the inside?

Those gels go hard over time I believe, so are only for lower speeds and short distances "to get you home".

So the answer is no.

I'll stick with 20p at every fuel fill up for now until I have got chance to go see someone properly.

This place is full of quick answers tonight must be plenty of other briskodians (men) avoiding stricly/x-factor/i'm a celebrity

put a tube in it.

Buy a 12v pump. They're a handy thing to have in the car anyway.

put a tube in it.

Lots of tubeless tyres won't allow that as they are rough inside and very quickly puncture the tube.

Stop been tight and get tyre wipped off and rim cleaned up and tyre refitted as thats usual cause of tyres going down,

Always run a wire brush round inside edges of wheels where tyre sits before new tyres are fitted but plenty of places don't