Custom Antenna Delete Cap for Toyota Tundra (1999-2026), Tacoma (1996-2016), FJ Cruiser (2007-2014), 4Runner (2002-2015), Sienna (2003-2014), Highlander / RAV4 (2000-2007), Stylish, Car Wash Safe

Okay I'll look for the caulk. You mean just to completly fill the inside of the base with caulk? Do you mean the "Delete Cap" they sell one on amazon. Amazon.com: Custom Antenna Delete Cap for Toyota Tundra (1999-2026), Tacoma (1996-2016), FJ Cruiser (2007-2014), 4Runner (2002-2015), Sienna (2003-2014), Highlander / RAV4 (2000-2007), Stylish, Car Wash Safe : Electronics