Tyre sealant foam (NLC)

[j2 lot]

Got a flat tyre that wouldn't stay inflated after pumping it up with a compressor so had to restore to the foam filler, the puncture was caused by a screw in the tread that snapped off so should be repairable.
Which repairers are most likely to fix tyres that have the foam in them rather than recommend replacement.

[duggiesmith]

I've used Tom Farmer in the past and was pleasantly surprised by the service (tyre sealant hadn't been used though).

[neil]

I think the reason they can't normally repair them is because they cant see where the puncture was. If it's an obvious screw then I'm sure it's possible.