Which term refers to a coating used to fill pores or voids in a surface?

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Multiple Choice

Which term refers to a coating used to fill pores or voids in a surface?

Explanation:
A sealer is the coating designed to fill pores or voids in a surface. By penetrating tiny openings, it blocks absorption and creates a uniform, non-porous base so subsequent coats—like paint or top coats—apply evenly and bond better. Primer also coats the surface to improve adhesion and provide a smooth base, but its primary role isn’t pore filling. Prep isn’t a coating at all; it’s the preparation steps. Sealant, on the other hand, is used to seal gaps and joints to prevent leaks, not to level a porous surface. So the term that best fits a coating used to fill pores is sealer.

A sealer is the coating designed to fill pores or voids in a surface. By penetrating tiny openings, it blocks absorption and creates a uniform, non-porous base so subsequent coats—like paint or top coats—apply evenly and bond better. Primer also coats the surface to improve adhesion and provide a smooth base, but its primary role isn’t pore filling. Prep isn’t a coating at all; it’s the preparation steps. Sealant, on the other hand, is used to seal gaps and joints to prevent leaks, not to level a porous surface. So the term that best fits a coating used to fill pores is sealer.

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