What type of sealant is TotalBoat Seal? Annette DiOrio December 08, 2021 19:46 Updated TotalBoat Seal is an elastomeric (synthetic rubber) adhesive sealant. TotalBoat Seal is not a silicone, polysulfide, polyether, or polyurethane product. Related articles What are the recommended applications for TotalBoat Seal elastomeric sealant? Can I use TotalBoat Seal elastomeric sealant to bond King StarBoard®? Do I need to prime the surface before using TotalBoat Seal? Can I use TotalBoat Seal below the waterline? Can I apply TotalBoat Polyester Structural Repair Putty to a metal surface? Comments 0 comments Please sign in to leave a comment.