Thanks Randy. Rick and I just went out and bought some MONO ULTRA caulk. I am going to remove the one thin strip of silicone we put on last week. We'll do that Sunday as we are kayaking tomorrow.
We looked and looked for butyl tape at Canadian Tire and could not find any. Now that I have examined the tops of our windows
and all around the small door window - that grey is butyl tape the previous owner put on. So if we want to do a clean up job I am wondering if it is easy to remove and simply replace (when we find some) as you say it is a good sealant?