What term describes material that removes contaminants and prepares glass for bonding?

• A. Primer
• B. Sealer
• C. Prep
• D. Sealant

Answer: (C)

The key idea is identifying the term for the material that cleans away contaminants and conditions the glass so the adhesive can bond effectively. This preparation step uses a prep product designed to remove oils, dust, wax, silicone, and other residues from the glass surface, and it often lightly decontaminates or etches the surface to improve adhesion. Without this step, the bonding agent might not grip properly, leading to weak or failed bonds.

Primer is a separate coating that improves adhesion on certain substrates, often applied to metal surfaces or as a base for subsequent layers, not specifically for cleaning the glass. Sealer and sealant are used after bonding to prevent moisture ingress and seal joints—they don’t describe the cleaning/conditioning phase. So the term that describes the material used to remove contaminants and prepare the glass for bonding is prep.