Red Seal Painter and Decorator Practice Exam

Which type of primer is commonly used for oil-based paints?

1. Water-based primer

2. Latex primer

3. Shellac primer

4. Oil-based primer

The correct answer is: Oil-based primer

Oil-based primer is specifically formulated to create a strong bond with oil-based paints, enhancing adhesion and ensuring a smooth finish. This type of primer is particularly beneficial when painting over surfaces previously coated with oil-based paint, or on porous surfaces that require sealing. The composition of oil-based primers allows them to effectively lock in stains, prevent bleed-through, and provide better coverage, making them ideal for use in conjunction with oil-based paints. In contrast, water-based primers or latex primers are designed for use with water-based paints and may not provide the optimal performance or adhesion when paired with oil-based paints. Shellac primers can also be used with oil paints, but they serve a different purpose, primarily focusing on blocking stains and odors. Hence, the oil-based primer is the most suitable choice for compatibility with oil-based paints, ensuring a seamless application and long-lasting results.