TotalBoat Seal is safe for use with applications below the waterline. Always ensure that Seal is completely cured to its full strength and hardness, prior to submersion.
TotalBoat Seal is not designed to be applied to wet surfaces, and will not cure underwater. All substrates must be completely clean and dry, and prepared according to the instructions, before applying Seal. Do not subject Seal to wet conditions until it has cured completely.