Osmo Flat Brush - 80mm

The Osmo Flat Brush - 80mm is primarily designed for the application of all oil-based wood finishes, hard wax oils, and certain oil-based paints, ensuring an even and smooth application.

While it might be possible in some cases, the brush is optimized for oil-based products. Water-based finishes may not be applied as smoothly, and the solvents in them could potentially affect the brush's performance over time. It's best to use products specifically recommended for the brush.

After removing excess Polyx-Oil by wiping on a rag, clean the bristles thoroughly with mineral spirits or turpentine. Rinse with water until all solvent is removed, reshape the bristles, and hang to dry.

With proper care and regular cleaning, the Osmo Flat Brush can last for many projects. Replace it if the bristles become permanently splayed, shed excessively, or if it can no longer provide a smooth finish.

The 80mm (approximately 3 inches) width is suitable for covering moderate to large surfaces efficiently, such as tabletops, cabinet doors, or sections of flooring, while still offering good control.

Yes, Osmo offers this flat brush in several other widths, including 25mm, 50mm, 60mm, and 100mm, to cater to different project requirements and preferences.

It is suitable for oil-based varnishes and finishes. For water-based varnishes, performance might be compromised, and specific compatibility should be checked.

This can happen if the solvent or paint was left to dry in the bristles. Try soaking the bristles in fresh solvent for a longer period, then gently work them. If the product has fully cured, the brush may be difficult to restore.

Ensure the brush is adequately loaded with finish, but not overloaded. Apply with smooth, consistent strokes in the direction of the wood grain. Over-diluted finish or trying to spread the finish too thinly can also cause issues. Clean and reshape the bristles if they appear splayed.

This may indicate a manufacturing defect or that the brush is nearing the end of its lifespan. Inspect the ferrule (the metal part holding the bristles) for any signs of damage. If shedding is persistent, consider replacing the brush.

Ensure you are using the correct type of finish for the brush. If using an oil-based product, confirm it hasn't started to cure in the bristles. If the brush is new and stiff, a brief soak in the appropriate solvent might help loosen it slightly.