Is there a waterproof sealing tape available which will adhere to a wet (or at least a damp) surface? An elderly relative, too far away for me to help in person, has a badly leaking connection between her cistern and her toilet. She reports that she tried a temporary fix by "wrapping plastic tape around the connector" but it wouldn't stick because the surface was too wet.
She's not able to send me a picture, but if wrapping the connector is a practical possibility, then is there a particular tape (preferably available from either B&Q or Wickes, both of which she can get to) which I can suggest to do the job until she can get a plumber in?
Many thanks.