What solvent is used to clean around the surface prepped area before priming?

• A. Acetone
• B. Water
• C. Mineral spirits
• D. Alcohol

Answer: (A)

Cleaning the surface before priming needs a solvent that can dissolve oils, greases, and other residues quickly and then evaporate completely so the surface is dry and ready for adhesion. Acetone does exactly that: it’s a strong degreaser that rapidly dissolves contaminants and evaporates almost instantly, leaving little to no residue. This quick evaporation minimizes moisture risk and helps ensure the primer adheres properly.

Water isn’t effective for removing oils and can leave moisture that weakens adhesion. Mineral spirits fetches the job done more slowly and can leave behind hydrocarbon residues that may interfere with bonding. Alcohol is fast and can clean well, but it’s not as robust as acetone for removing certain contaminants and may not evaporate as cleanly in all cases. So acetone is the best fit for preparing the surface right before priming.