What is used to clean polyurethane off a brush?

Study for the California Painting and Decorating Contractor (C-33) License Exam. Prepare with customized questions and detailed explanations. Enhance your knowledge and get ready to succeed!

Multiple Choice

What is used to clean polyurethane off a brush?

Explanation:
Polyurethane used on brushes is oil-based, so you need a solvent that can dissolve oil-based coatings. Paint thinner is specifically formulated to break down oil-based finishes like polyurethane, making it the most effective choice for removing the film from brush bristles and letting you rinse the brush clean. Water won’t dissolve the polyurethane, and detergent alone isn’t strong enough to break down the resin. Mineral spirits are a similar oil-based solvent and can work, but paint thinner is the standard option highlighted for this cleanup.

Polyurethane used on brushes is oil-based, so you need a solvent that can dissolve oil-based coatings. Paint thinner is specifically formulated to break down oil-based finishes like polyurethane, making it the most effective choice for removing the film from brush bristles and letting you rinse the brush clean. Water won’t dissolve the polyurethane, and detergent alone isn’t strong enough to break down the resin. Mineral spirits are a similar oil-based solvent and can work, but paint thinner is the standard option highlighted for this cleanup.

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