Yes tyre weld or similar will work but, once in you won't know you have something in the tyre that would otherwise cause a puncture, worse even if you did notice it, I understand the tyre is no longer repairable in the conventional way.
I have some in a lawn tractor tyre, I wanted to let some pressure out and found it also prevents you doing that without unscrewing the valve!!
All in all then usefully in an emergency but little else.