Does TotalBoat Seal require a primer before application? Eric Boudreau April 01, 2022 14:55 Updated TotalBoat Seal elastomeric sealant does not require any primers before applying it to a substrate. Related articles Is TotalBoat Seal an acceptable sealant for teak joints and deck seams? What can TotalBoat Seal be used for? Is TotalBoat Seal sandable and paintable? Which caulk gun is needed to dispense TotalBoat Seal? What is your return policy?