Doesn't look like you have near enough "goop". Clean it all off, go to the local Home Improvement Center and get a small tub of Plumbers Putty (a couple $) and re-set it. Look at the 1st page of my post on my Kayak (a few posts down) and see how mine is set. Be sure not to work bubbles into it, make a 1" "pancake and press the TD into it firmly, then work some putty over the sides of the TD while holding it firmly in place.