Had a problem the other day. Got a puncture and the hole was too big for the spray foam to do its job and seal it ( foam was just coming back out of the hole, and it was on a dark unlit road!) And yes I did jack it up to take the pressure off the tyre!
Two hours of waiting for recovery truck ensued.
Needed = light weight (as light as two spray cans of emergency tyre foam preferably!!!) space saver (renault hasnt got a clue) and couldnt offer any suggestions.