Errrrrr….. Should not the Slime go into the tyre before you use the bike?
And have you got a pump and or some Co2 Cartridges?
I'd chuck in a medium size adjustable spanner as well...… 
From what I've seen, the Slime can go in the tyre before or after you get a puncture. I don't put it in as a preventive measure because when I came to drop the pressure on a tyre some years back, the Slime blocked the valve, acting as if there were a puncture

. I couldn't lower the pressure even after removing the valve. I had to keep poking a fine wire down the valve tube to try and clear the Slime fibres.
Yep, got a bicycle pump. Hard work pumping up the rear tyre before the ride home.
Adjustable spanners are a butcher's tool

! Use the correct size spanner, or a pair of mole grips at a push.