Spar Urethane vs. Urethane

Attribute	Spar Urethane	Urethane
Usage	Primarily used for outdoor applications due to its UV protection and water resistance	Used for a variety of applications, both indoor and outdoor
Flexibility	More flexible and less prone to cracking in outdoor environments	Less flexible and may crack over time in outdoor environments
Drying Time	Longer drying time compared to regular urethane	Shorter drying time
Appearance	Provides a warm, amber tone to wood surfaces	Clear finish without altering the color of the wood

Introduction

When it comes to protecting wood surfaces, Spar Urethane and Urethane are two popular choices. Both offer excellent durability and protection against moisture, UV rays, and general wear and tear. However, there are some key differences between the two that can help you decide which one is best for your project.

Composition

Spar Urethane is specifically formulated for outdoor use and contains added UV blockers to protect against sun damage. It is also more flexible than traditional urethane, allowing it to expand and contract with the wood as it changes with the weather. Urethane, on the other hand, is a general-purpose finish that is suitable for both indoor and outdoor use. It is typically harder and more rigid than Spar Urethane, making it ideal for high-traffic areas.

Application

When it comes to application, Spar Urethane is often preferred for outdoor projects such as decks, fences, and outdoor furniture. Its flexibility allows it to withstand the elements without cracking or peeling. Urethane, on the other hand, is better suited for indoor projects such as floors, cabinets, and furniture. Its hardness provides a durable finish that can stand up to heavy use.

Appearance

Both Spar Urethane and Urethane come in a variety of finishes, including gloss, semi-gloss, and satin. However, Spar Urethane tends to have a slightly amber hue that can warm up the natural color of wood. This can be desirable for outdoor projects where a more natural look is preferred. Urethane, on the other hand, dries clear and does not alter the color of the wood, making it ideal for indoor projects where the natural color of the wood is desired.

Durability

When it comes to durability, both Spar Urethane and Urethane offer excellent protection against scratches, stains, and moisture. However, Spar Urethane is better suited for outdoor use due to its added UV blockers and flexibility. It can withstand the harsh elements without deteriorating or yellowing. Urethane, on the other hand, is better suited for indoor use where UV exposure is not a concern. Its hardness provides a tough finish that can withstand heavy use without wearing down.

Cost

In terms of cost, Spar Urethane is typically more expensive than Urethane due to its specialized formulation and added UV blockers. However, the extra cost may be worth it for outdoor projects where durability and UV protection are important. Urethane, on the other hand, is more affordable and readily available, making it a popular choice for indoor projects where UV exposure is not a concern.

Conclusion

Ultimately, the choice between Spar Urethane and Urethane will depend on the specific needs of your project. If you are looking for a durable finish that can withstand the elements, Spar Urethane may be the best choice. If you are looking for a tough finish for indoor projects, Urethane may be more suitable. Consider the composition, application, appearance, durability, and cost of each option before making your decision.