john.west wrote:
Foam in Allotment wheelbarrow tyres become flat proof ?
https://www.youtube.com/watch?v=bQbRfspyxW4
What kind of foam might we be able to get in the U.K. ?
Ordinary builders foam should be fine. It needs a little moisture to
cure so when you are filling it up with the polystyrene solids add a
little water in too ready for the foam injection.