Welcome, Keith. The only way it will last is to seal the outside. Anything else is cosmetic. Have good drainage, get rid of standing water, and make sure downspouts are carried out from house. I enjoy this:
A forum community dedicated to Do it yourself-ers and home improvement enthusiasts. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Helping You to Do It Yourself!