Marine Varnish

Marine Varnishes and Polyurethanes

Varnish is a term often used to describe any wood finish, but it specifically refers to a transparent coating made up of oil, resin, and special solvents. This coating is essential for protecting wood surfaces against UV rays, saltwater, and weather damage, making it highly durable and flexible to withstand the marine environment. Below is a detailed overview of various types of marine varnishes and polyurethanes, their applications, and benefits.

Types of Marine Varnishes and Polyurethanes

Marine Grade Polyurethane

Marine polyurethane is a robust finish designed for salty environments. It provides excellent protection against moisture, UV rays, and abrasion. Due to its durability and flexibility, this type of polyurethane is ideal for boats and other outdoor wood surfaces.

Spar Urethane

Spar urethane, sometimes called Marine spar varnish, is a type of varnish specifically formulated for wooden masts. It contains UV inhibitors that protect the wood from sun damage. It is known for its flexibility, which helps it withstand the expansion and contraction of wood in varying weather conditions. This varnish is available in various finishes, including high gloss and clear gloss, to achieve the desired shine on wood surfaces.

Marine cetols

Marine Cetol is a wood finish used on boats. It provides a durable, weather-resistant coating that enhances the wood's natural beauty while protecting it from UV rays and moisture. Cetol is also easier to apply and maintain than traditional marine varnish for wood.

Applications of Marine Varnishes

Marine varnishes are versatile and can be used on a wide range of wood surfaces, both indoors and outdoors. Some marine varnishes contain oil alkyd for durability and flexibility.

Here are some common applications:

• Wooden Boats: Protects against moisture, saltwater, and UV rays.
• Outdoor Furniture: Enhances the natural grain and provides a durable finish.
• Teak Surfaces: Maintains the golden tone of teak wood and prevents graying. Cetols are often a good application for teak.
• Floors and Cabinets: Adds a protective layer that guards against scratches and moisture.

Application and Maintenance

Applying marine varnish requires multiple coats for the best protection. Each coat should be allowed to dry thoroughly and lightly sanded before applying the next. Regular maintenance, including periodic reapplication and touch-ups, is necessary to keep the finish in good condition.

Choosing the Right Varnish

When selecting a marine varnish, consider the following factors:

• Type of Wood: Different woods may require specific types of yachting varnish.
• Environmental Conditions: Choose a marine yacht varnish with adequate UV protection for your local climate.
• Desired Finish: Decide between high gloss, satin, or matte finishes based on your aesthetic preference.

Fisheries Supply is your premier supplier of marine varnish from top brands such as Pettit, Interlux and Epifanes. We offer a full range of quality marine-grade varnish to enhance the natural beauty of wood surfaces. Our representatives are available to help you choose the best product for your needs.

Shop boat varnish now and save or browse our great selection of marine wood sealers. Or if you’ve never varnished before and you’re not sure where to start, read our article "Varnishing Tips and Tricks".