Answer for What type of caulking should I use on the exterior for siding?

Any high quality paintable caulking will work. I like Dap Dynaflex 230. It has minimal shrinkage and is very flexible. Another caulking is Dap's PowerPoint 200.

For very wide cracks or areas that have a lot of movement give Big Stretch by Sashco a try. All three are good products.

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