Sealants can be used to make expansion joints watertight when installing products, such as coping, gravel stops, and fascia.

• A. False
• B. Sealants can be used to make expansion joints watertight when installing products, such as coping, gravel stops, and fascia.
• C. It depends
• D. Not specified

Answer: (B)

Sealants are used to seal expansion joints in exterior metal trim to prevent water from sneaking through as materials move with temperature changes. In installations of coping, gravel stops, and fascia, joints between components must accommodate expansion and contraction while staying watertight. A flexible sealant (like silicone or polyurethane) corrects this by filling the gap and bonding to the metal and surrounding substrates, often with proper backer rods and surface prep to allow for movement. When applied correctly, the sealant provides a resilient barrier that keeps moisture out without restricting the necessary joint movement.