ePaint EP-21 Biocide-Free Fouling Release Coating Now Available in Spray Cans

ePaint’s EP-21 fouling release coating is now offered in a convenient spray-can format, providing a biocide-free option for protecting outboard brackets, outdrives and other underwater metal components. The new aerosol makes it easier to apply the same fouling-release technology where brush or roller application can be awkward or impractical, and it expands the product’s versatility for boat owners and marine service technicians.

EP-21 spray is available in two factory colors: silver-blue (Yamaha-like) and metallic gray (Honda-like). These color options aim to blend with common outboard and drive finishes while providing the functional benefits of a fouling-release surface. According to the manufacturer, the aerosol format is “easy to apply to outboard brackets and outdrives,” making spot treatments and small-area coverage straightforward without the need to mask large sections or mix product on site.

Because EP-21 is formulated without biocides, it can be used on underwater metal surfaces and on aluminum components that are not suitable for traditional copper-based antifouling paints. Biocide-free fouling-release coatings work differently from conventional antifouling systems: instead of poisoning marine organisms, they create a slick surface that makes it harder for fouling to attach firmly and easier to clean when it does. This makes the product an alternative for owners who want to avoid copper or other biocidal additives on certain metal substrates.

The spray can contains 12 ounces of EP-21 and retails for $34.19. The aerosol option is intended primarily for targeted applications where a spray provides better access or a smoother finish than brush-applied coatings. As with any coating, proper surface preparation—cleaning, degreasing and ensuring a compatible substrate—is important for best results. The manufacturer recommends following label instructions and any surface preparation guidelines to ensure adhesion and performance.

Potential uses for the spray include touch-up protection for brackets and external drive surfaces, application on aluminum trim tabs and other underwater metal parts that cannot tolerate traditional antifouling paints, and small repair jobs where masking and large-scale application are impractical. Because this coating is designed to be biocide-free, it may be preferable in sensitive areas where minimizing chemical release is a priority. Boat owners who are uncertain about compatibility with a particular substrate should consult the product label or contact ePaint for guidance.

Beyond ease of application, the spray format can simplify maintenance routines. Small areas that are starting to show wear can be addressed quickly without the time and equipment required for larger paint jobs. For professional yards and DIYers alike, carrying a can of EP-21 spray offers a compact option for keeping vulnerable underwater metals protected between more extensive maintenance cycles.

ePaint Company is based in East Falmouth, Massachusetts. For product details, technical guidance or purchasing information, you can contact ePaint by phone at (508) 540-4412 or visit their website for full specifications and application instructions: www.epaint.com.

When considering any fouling-control strategy, evaluate the substrate, local antifouling requirements and the type of boating you do. Biocide-free fouling-release coatings like EP-21 offer a different approach from traditional antifouling paints and can be a useful tool in a comprehensive maintenance plan, particularly for metal components that are sensitive to copper or other biocidal systems.