I have a cabin that needs to be caulked around the windows and would appreciate a suggestion with the best caulk that will not shrink and last for 10 years or more. I have used silicone, but its not suggested for porous materials, as with concrete, and I have used the latex caulk which is cheap and does not last, but its recommended. Not going with the cheap stuff and it does not need to be painted and I would like to get a different color besides clear or white!