I am at the point where I have to install my wood keel over my nylon skinned kayak. The nylon is coated with polyureathane spar varnish. I have routed out a grove in the keel so it will fit over the seam and tacks. There still are a few places where there will be a small gap between the keel and the skin.

Could I use a clear RTV between the two before I screw on the keel? Or will I have to use a clear epoxy?

Thank you for any information you can share with me./ Ken