What is the diameter of 7 strand caulking wick? Eric Boudreau April 01, 2022 14:47 Updated The diameter of 7 strand caulking wick is roughly 1/16". Related articles Caulking and Marine Sealant Coverage Chart Can TotalBoat Seal be used to bond StarBoard? What surfaces and applications are suitable for Sikaflex 221? What is the maximum temperature for TotalBoat Seal? Sikaflex 1A surface compatibility and application Comments 0 comments Please sign in to leave a comment.