Which statement best describes the purpose of a defogging step before bonding?

• A. It increases the amount of adhesive
• B. It creates fog to aid inspection
• C. It creates a clear bonding area by removing moisture
• D. It adds a scent to the cabin

Answer: (C)

The main idea here is preparing a dry, clear bonding surface. When you’re bonding a windshield, any moisture or condensation on the glass or gasket can prevent the adhesive from properly wetting and bonding to the surface, which can weaken the bond and affect long-term durability. Defogging dries out the area and removes moisture so the urethane adhesive can form a strong, uniform bond.

That’s why the best choice describes creating a clear bonding area by removing moisture. It doesn’t increase how much adhesive you use, it doesn’t deliberately create fog, and it doesn’t add a scent to the cabin.