Will OKO Puncture Free swill inside the tyre and affect the valve stem causing a misreading of the tyre pressure?
When applying the OKO product, some residue may remain inside the valve stem. This should be cleared by using an air-line as per the instructions. OKO Puncture Free Tyre sealant coats the inside of the tyre. It will not travel back up the valve stem; after all there is no air being forced via the valve stem through to the outside environment.