This sounds like you have a damaged seal so you can also expect after a sort while for it to start dripping again, so check on a very regular basis, When you squeeze in the silicon only put a very small amount in, about the size of a pea. If you put too much into it you can blow the seal out of its housing, been there done that.
There is a thread on here somewhere about these seals, perhaps someone with the know how can point you in the right direction, and even how to replace them with the boat still in the water.