Exterior Water-Based Topcoat, 1 Gallon, Flat

Exterior 450 Topcoat is a clear-drying finish suitable for vertical exterior surfaces, such as fences, patio furniture, garage doors, entrance doors, and interior windows. It is not recommended as a deck finish. This product is fortified with UV absorbers to stabilize the finish and built-in mildewcide to retard mold and mildew growth. Exterior 450 Topcoat performs well as a clear coat or as an optional topcoat over General Finishes Milk Paint.

It is important to note that clear topcoats should not be applied over bright white paint, as yellowing may occur due to a reaction to the substrate. Similarly, light color paints may also experience yellowing due to topcoat application, but it will be less noticeable.

The water-based formula of Exterior 450 Topcoat can be brushed, sprayed, or rolled, and cleanup is easy with soap and water. However, the product will not prevent the wood from changing color from sunlight, as it is designed to stabilize and protect the integrity of the finish rather than to prevent the natural aging process of the wood.

In summary, Exterior 450 Topcoat is a versatile, clear-drying finish that is suitable for a variety of exterior vertical surfaces, providing UV protection and mildew resistance. Its water-based formula makes it easy to apply and clean up, but it is important to be aware of the potential for yellowing when used over certain paint colors.

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