The above was a tenner from plumbase.
Half a tube in from the top and.... Nothing. Did make it cold though.
So thought I might as well use the can before trying something else. Used some magura tubing so I could spray it down from below via the bottom bracket.like this
Now the whole seat tube went white.
gave it a twist and it moved! A little. Two minutes later...
Seat tube isn't too dirty
I've probably taken seven or eight very stuck seat posts out now. This is by far and away the best method I've used. I won't use any other now.
It's harmless
It's easy to do
It's quick
It doesn't damage bike or post or paint
