To paint a masonry wall with high alkalinity, which painting option should be used?

To paint a masonry wall with high alkalinity, which painting option should be used?

• A. Water repellent paint
• B. alkalyd paint
• C. alkalyd resistant paint
• D. epoxy paint

Answer: (C)

When masonry is highly alkaline, the paint must stand up to that alkaline environment so the film doesn’t break down. Regular paints, including standard alkyd paints, can be attacked by the alkalinity, leading to peeling or chalking. A paint specifically formulated to resist alkali—an alkyd resistant paint—is designed to withstand those alkaline conditions, maintain adhesion to the cementitious surface, and keep the coating intact over time. Water-repellent finishes help with moisture but don’t address alkali resistance. Epoxy paints are very durable but can be less forgiving on raw, highly alkaline masonry and may require more surface prep. So the alkyd resistant option best matches the need for alkali resistance on a highly alkaline masonry wall.

When masonry is highly alkaline, the paint must stand up to that alkaline environment so the film doesn’t break down. Regular paints, including standard alkyd paints, can be attacked by the alkalinity, leading to peeling or chalking. A paint specifically formulated to resist alkali—an alkyd resistant paint—is designed to withstand those alkaline conditions, maintain adhesion to the cementitious surface, and keep the coating intact over time.

Water-repellent finishes help with moisture but don’t address alkali resistance. Epoxy paints are very durable but can be less forgiving on raw, highly alkaline masonry and may require more surface prep. So the alkyd resistant option best matches the need for alkali resistance on a highly alkaline masonry wall.