On Sat, 20 Oct 2018 18:03:12 +0100, "Jim GM4DHJ ..."
wrote:

snip
it was that green stuff....slime


Quite. We have it in our cycles, where it's fine and being Schrader
valves we can always take them out etc.


yes I find they seal the valves as well and you cant pump them up .....

Where 'they' is not including Punctureseal?

The point is, 'Slime' stays liquid so *can* get back into the valve.
Punctureseal is thrown to the outside (or the inside of) the tyre as
soon as you first pull away after 'installing' it and that's where it
stays, nowhere near the valve or even the rim / sidewalls.

As I was saying, it's a shame that the likes of Punctureseal are
sullied by people not understanding that not all tyre sealants are
created equal (and post / say stuff as if they were).

Cheers, T i m