Which statement best describes surface cleaning and priming before adhesive application?

• A. It ensures proper adhesion of adhesive to vehicle surface.
• B. It slows down the curing process.
• C. It seals the glass and frame irreversibly.
• D. It is optional and can be skipped if rushed.

Answer: (A)

Preparing the surface through cleaning and priming is about creating a clean, receptive base for the adhesive so it can bond reliably. Cleaning removes wax, oils, dirt, and other contaminants that would form a barrier between the adhesive and the vehicle surface, preventing a strong bond. Priming further improves bonding by adjusting the surface energy and improving how the adhesive wets the surface, promoting even spread and stronger adhesion. Together, these steps maximize adhesive performance and reduce the risk of bond failure.

That’s why this option is the best description: it directly focuses on ensuring proper adhesion to the vehicle surface. Cleaning and priming do not slow curing, they don’t irreversibly seal the glass and frame, and they aren’t something that can be skipped without compromising bond strength.