Which statement best describes the roles of protective coatings/primer and sealants in corrosion prevention?

Which statement best describes the roles of protective coatings/primer and sealants in corrosion prevention?

• A. Sealants protect the surface as a barrier against moisture; protective coatings/primer seal joints.
• B. Protective coatings/primer provide barrier against moisture; sealants prevent moisture ingress at joints.
• C. Both serve identical roles; it doesn't matter which is used.
• D. Coatings/primer are optional; sealants are unnecessary.

Answer: (B)