I hope someone can help me. I need caulking for a wood-product siding on the exterior. This house is 38 years old and has parts of the facade that is a wood-type product that resembles shingles. The handyman is going to caulk, prime and repaint. I want to be certain that the correct caulk is used, as some portions along the edge have been neglected and look flaky. I know this is not a very good description but hopefully, it is enough to enable some knowledgeable person to point me in the right direction. Thanks!