Take the valve core out, inject through the valve stem. Should be able to do it without a syringe- most sealant bottles have suitably shaped nozzles.
Pro tip - squish the tyre down - to expel air - then push the nozzle on then release the tyre and it will suck the sealant in to replace the air that came out.
Take the valve core out, inject through the valve stem. Should be able to do it without a syringe- most sealant bottles have suitably shaped nozzles.
Pro tip - squish the tyre down - to expel air - then push the nozzle on then release the tyre and it will suck the sealant in to replace the air that came out.