Shop West Marine for marine caulking, adhesives, bedding compounds, sealants and duct tape. We offer marine caulk for a wide range of applications. Depending on the application, you will require polyurethane, polysulfide, silicone or polyether caulk. For some applications, you may prefer to use butyl caulking tape or a bedding compound. West Marine offers all the popular brands, including 3M, Boat Life, Blue Dolphin, Sika and West Marine.