[RedDevil]

Originally Posted by ecomodded

I would like to find a way to fill a tire with a durable dense memory type of foam.
There must be a super foam of sorts that would work.

I did use goo in my old mopeds tires until my rear tire blew up and I nearly crashed.
The bicycle repair shop pointed out that the tire was damaged earlier on but I had failed to notice it because the goo sealed the gap.
Without the sealant I would have spotted the leak earlier and not have endangered myself. Maybe I could have removed the cause and even save the tire...
The same is true for tires filled with foam of course.

So tire sealant may be a solution for emergencies to seal leaks that cannot be fixed in another way, but prefilling tires with sealant or foam is rather dodgy.
A leak is a sign of tire damage, it needs inspection; the fact that the tire goes flat forces you to inspect it. It is a safety feature

My car has an emergency repair kit aboard but I will only use that if there is no alternative, and then change the tire at the first opportunity.