What is the diameter of 7 strand caulking wick? Eric Boudreau March 30, 2021 15:19 Updated The diameter of 7 strand caulking wick is roughly 1/16". Related articles Caulking and Marine Sealant Coverage Chart Sikaflex 1A surface compatibility and application What is the maximum temperature for TotalBoat Seal? What surfaces and applications are suitable for Sikaflex 221? 3M 5200 compatibility and application Comments 0 comments Please sign in to leave a comment.