Caulking an antique deck

[PArestorer]

I'm currently seeking advice as to what product works best when caulking the deck on my 1942 Chris. The previous owner had done a great job removing the old caulk, but I'm unsure which product to proceed with recaulking. I'd like something that is easy for an amateur to use and will last long. The caulk is more decorative than structural and must be squeezed into 1/4 inch cracks between mahogany strips. Thank you for any input you can provide on this newly tried skill.

[gonzo]

SIKA and 3M make products specifically for that use.