Preserve and protect exterior wood with Varathane Ultimate Gloss Clear Water-Based Spar Urethane. This 1 gal finish combines a brilliant clear gloss with a flexible, weather-ready film designed to withstand sun, rain, and seasonal movement—so decks, fences, siding, and outdoor furniture keep their natural beauty longer.
What makes this spar urethane stand out
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Crystal-clear gloss that enhances the wood’s natural grain without adding color or amber tint, perfect for preserving the look of freshly finished or restored projects.
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Outdoor-ready protection with a flexible film that tolerates wood expansion and contraction, reducing peeling and cracking in changing weather.
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UV resistance to help slow color fade and graying from sun exposure, keeping surfaces looking newer, longer.
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Water-based formulation for easy cleanup with soap and water, lower odor compared to solvent-based finishes, and a safer, more user-friendly project experience.
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Generous coverage—about 225–350 sq ft per gallon depending on surface porosity—so you can finish larger outdoor projects efficiently.
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Clear guidance on reuse with a 2-hour recoat window and a full 24-hour cure time, helping you plan for quick turnarounds and protected surfaces.
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Brush-only application for precise control and a smooth, even film on vertical or horizontal surfaces.
Ideal use cases
- Outdoor decks, fences, and railing systems that endure sun and rain
- Exterior siding and trim where a durable, clear finish is desired
- Outdoor furniture, pergolas, and planters that benefit from a weather-resistant sheen
How to get the best results
- Prepare the surface: clean thoroughly, allow to dry completely, and sand any rough areas for an even base.
- Stir the Varathane Ultimate Gloss Clear thoroughly until the film is uniform and smooth.
- Apply with a high-quality brush in long, even strokes following the wood grain to minimize runs and streaks.
- Recoat after the recommended 2 hours, weather permitting. For best protection, apply a second coat after the first has fully set.
- Allow the final coat to cure fully for 24 hours before light traffic or heavy use resumes.
Product details at a glance
- Color: Clear
- Finish: Gloss
- Base: Water-based
- Container: 1 gallon
- Coverage: 225–350 sq ft per gallon
- Application: Brush
- Time Before Recoating: 2 hours
- Full Cure Time: 24 hours
- Indoor/Outdoor: Outdoor
- UV Resistant: Yes
- VOC Level: 271
With Varathane Ultimate Gloss Clear Water-Based Spar Urethane, you get a durable, transparent shield that preserves the natural look of outdoor wood while delivering lasting protection against the elements. Ready to elevate your exterior projects with a glossy, protective finish that respects wood movement and outdoor realities? This 1 gal can is designed to tackle them head-on, one coat at a time.
