Any material used to seal joints or openings against intrusion of water gasses air or dirt

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

Answer: (A)

Sealant is the material used to seal joints or openings against intrusion of water, gases, air, or dirt. It’s formulated to fill gaps and bond to the sides of a joint, then cure into a flexible, watertight seal that can accommodate movement without cracking. This flexibility and sealing capability are why it’s chosen for around windshields and other joints where a tight, durable barrier is needed.

The other terms don’t fit as the primary sealing material: a sealer usually refers to a coating that blocks porosity on a surface rather than filling and sealing gaps; primer is a preparatory coating applied before paint to improve adhesion; prep refers to the process of preparing a surface, not a sealing material.