Tyre valve leaking !!!!

[Geno]

Is there anything i can di to stop a slow leak at neck of valve .??? Slow leak but not good enough from a new tyre that i have just about scrubbed in. Dont really fancy drive bact to shop with rim , Waste of whole day . Any help . Tyre has been ultrasealed when new 2nd July .

 

[Wizard]

Just fit a new valve core. You'll get a valve core remover for a couple of quid from a good carparts store, and a valve insert from any tyre fitters.

Here's one!