Topside Paint

What Is Topside Paint and Why Does It Matter?

Topside paint is a specialized marine coating applied to the exterior hull surfaces above the waterline. Unlike bottom paints, which are engineered to resist marine growth and survive constant submersion, topside paints are formulated to endure a different and equally punishing set of conditions: relentless UV exposure, salt spray, wind, rain, and the mechanical abrasion that comes with regular use. A quality topside finish does more than make your boat look sharp — it acts as the primary barrier protecting your hull material from moisture intrusion, oxidation, and long-term surface degradation.

Whether you're refreshing the gelcoat look of a fiberglass runabout, restoring the topsides of an aging sailboat, or finishing a custom build from bare substrate, choosing the right topside paint system is critical. Topside paints generally fall into three main categories:

• Alkyd enamels — Traditional oil-based formulas that are easy to apply and budget-friendly, suitable for recreational boats with moderate exposure.
• One-part polyurethanes — A step up in durability and gloss retention, these single-component coatings are DIY-friendly and deliver solid UV resistance with excellent color stability.
• Two-part polyurethanes — The gold standard for professional-grade gloss and hardness, these systems cure through a chemical reaction between two components, producing a finish that rivals factory gelcoat in depth and durability.

Key Considerations When Shopping for Topside Paint

Before selecting a topside paint, consider your hull material — fiberglass, wood, and aluminum each have different surface preparation and primer compatibility requirements. Proper priming is essential: a compatible primer ensures adhesion, prevents corrosion on metal surfaces, and creates the uniform base that topside finishes need to perform at their best. You should also factor in your application method (brush, roller, or spray), the climate you boat in, and how much gloss retention you need over time.

For saltwater boaters, UV stability and resistance to salt spray are top priorities. Freshwater sailors may prioritize ease of application and recoatability for seasonal maintenance. Either way, always verify that your chosen topside product is compatible with any existing coatings on the hull.

Top Topside Paint Brands

Interlux Paint is the dominant name in this category, and for good reason. Interlux, a division of AkzoNobel, is a world-renowned manufacturer of high-performance marine coatings. Their topside lineup spans traditional alkyd enamels, one-part polyurethanes, and two-part polyurethanes — including the popular Brightside one-part polyurethane and the Perfection two-part system, which unlike many professional-grade two-part paints can be successfully applied by novice boaters.

Awlgrip is synonymous with professional yacht finishing. Awlgrip's two-part polyurethane topcoat systems are a benchmark in the marine industry, prized by boatyards and serious owners for their exceptional gloss depth, hardness, and long-term color retention — often the coating of choice on high-end production and custom yachts.

SprayMax brings a convenient aerosol approach to topside finishing. Their 2K aerosol technology delivers a two-part polyurethane finish in a single spray can, making professional-quality results accessible for touch-ups and smaller projects without the need for spray equipment.

Pettit Paint is another storied name in marine coatings with a long track record among recreational boaters. Pettit's EZ-Poxy and Flagship topside formulas are well-regarded for their ease of application and durable, high-gloss results on both power and sail vessels.

Eastwood Company rounds out the category with coatings expertise rooted in automotive restoration. Their marine-compatible topside options appeal to builders and restorers who want proven, hard-wearing finishes backed by a brand known for no-compromise surface protection.