Polyurethane

Polyurethane

Polyurethane is a synthetic resin commonly used as a clear protective finish for wood frames, artwork surfaces, and other decorative objects. It forms a hard, durable coating that enhances the appearance of wood while providing water and chemical resistance.

Uses in Framing and Art

• Protective coating for wood frames to prevent scratches, dents, and moisture damage.
• Sealant for artwork surfaces, especially on wooden panels or decorative objects.
• Enhancing the aesthetic appeal of a frame by providing a glossy, satin, or matte finish.
• Used in combination with gilding or staining to increase longevity of the finish.

Properties

• Durable and resistant to abrasion, water, and mild chemicals.
• Available in various sheens: glossy, satin, semi-gloss, and matte.
• Can be applied by brush, spray, or wipe-on methods.
• Forms a hard, clear film over the surface without yellowing significantly over time (for high-quality formulations).
• Compatible with a variety of wood types and finishes.

Advantages

• Provides long-lasting protection for wood frames and surfaces.
• Enhances the natural beauty of wood grain and decorative finishes.
• Resistant to moisture, reducing the risk of water damage.
• Relatively easy to apply and maintain.

Limitations

• Can appear plastic-like if applied too thickly or in multiple coats.
• Requires proper ventilation during application due to fumes from some formulations.
• May yellow over time if low-quality polyurethane is used.
• Not always suitable for direct contact with archival or delicate paper-based artwork.

Related Terms

• Oil Gilded
• Enamel
• Rub N Buff
• Patina