Best Fairing Compounds for Boats
Choosing the right fairing compound is essential for restoring a boat’s hull and maintaining a smooth, watertight surface. This guide highlights top-rated marine fairing fillers that work on fiberglass, wood, aluminum, and steel. Each option below is designed to fill dents, gouges, and imperfections while providing a durable, sandable finish above or below the waterline.
Summary Table Of Selected Products
| Product | Brand | Key Strength | Format | Notes |
|---|---|---|---|---|
| TotalBoat TotalFair Marine Epoxy Fairing Compound | TotalBoat | High strength epoxy, waterproof finish | 2 quart kit | For fiberglass, wood, aluminum, steel |
| TotalBoat Polyester Fairing Compound | TotalBoat | Fiber-reinforced polyester with smooth spread | Quart kit | Above waterline cosmetic repairs |
| TotalBoat Polyester Fairing Compound (Gallon) | TotalBoat | Versatile polyester finish with low sag | Gallon kit | Great for large areas |
| TotalBoat TotalFair 2 Pint Kit | TotalBoat | Same epoxy formula in smaller package | 2 pint kit | Compact option for small projects |
| Fasco Fas-Fair #26 Epoxy Fairing | Fasco Epoxies | High-strength epoxy fairing, quick cure | Quart kit | Excellent for fast turnaround |
| Pettit Ez Fair Fairing Compound | Pettit | Marine-grade fairing option | Quart | Simple, reliable fairing choice |
When selecting a fairing compound, consider the material compatibility (fiberglass, wood, metal), curing time, workability, and whether you need an epoxy or polyester resin. Below are five strong options that cover a range of hull repair needs, from quick cosmetic fixes to structural fairing ready for sanding and finishing.
TotalBoat TotalFair Marine Epoxy Fairing Compound (2 Quart Kit)
TotalFair epoxy fairing compound blends high strength with a lightweight two-part system. It is designed to smooth rough spots and fill voids on boats, canoes, and other watercraft. The marine-grade putty bonds firmly to damaged areas and cures without pinholes on wood, aluminum, steel, and fiberglass. Cured TotalFair is waterproof, making it suitable for areas both above and below the waterline. The formula uses a simple 1:1 mix ratio, with blue and yellow components that turn green for easy mixing. It is formulated to resist sagging on vertical or overhead surfaces, contributing to a clean, feathered edge when feathering to a fine finish. Ideal for permanent repairs and high-strength applications, this filler supports long-term durability in marine environments.
TotalBoat Polyester Fairing Compound (Quart Kit)
This premium marine-grade, two-part polyester filler is designed for cosmetic repairs on gelcoat, fiberglass, and other composites above the waterline. It sands smoothly and feather-edges easily with a buttery consistency that resists sagging on vertical surfaces. It works well for filling pinholes, print-through, spider cracks, and other surface defects. The compound is versatile for deck or hull repairs and pairs well as a finishing putty over compatible TotalBoat repair products, offering a reliable option for projects that require a strong, sandable finish with good bonding to surrounding materials.
TotalBoat Polyester Fairing Compound (Gallon Kit)
This gallon-sized polyester fairing compound mirrors the quart option with greater volume for larger jobs. It maintains a buttery consistency for easy application by trowel or spreader and feathering at edges. Like other TotalBoat polyester fillers, it resists sag on vertical surfaces and is suitable for above-waterline cosmetic repairs, offering a cost-effective solution for multiple hull sections or extended repair projects. It complements epoxy systems for deck and hull work, providing flexibility in material choices for professional or DIY boat care.
TotalBoat TotalFair Epoxy Fairing Compound (2 Pint Kit)
This 2-pint kit provides the same high-strength epoxy fairing formula in a compact package suitable for smaller repairs or detailed work. The product shares the epoxy benefits of strong adhesion and waterproofing, with the same mix ratio and feathering properties as the larger quart and gallon options. It’s a practical choice for artisan projects, touch-ups on fiberglass or metal surfaces, and repairs that require precise control of filler thickness and edge definition. Expect durable, waterproof results that withstand marine exposure when properly cured.
Fasco Fas-Fair #26 Epoxy Fairing Compound (Quart Kit)
Fasco Fas-Fair #26 epoxy fairing compound offers a high-strength solution with a user-friendly 1:1 mix. The white and red components blend into a uniform color for consistent application. It dries to a firm, sandable finish and cures in a timeframe suitable for projects around 76°F, enabling relatively quick turnaround. The formula is designed to hold on vertical surfaces without sagging, making it suitable for fairing patches, gaps, and edge transitions on boats, as well as repair work on other structures requiring a robust epoxy filler.
Pettit Ez Fair Fairing Compound (Quart)
Pettit Ez Fair is a straightforward fairing option designed for ease of use. The quart-size package provides a reliable, marine-grade fairing compound suitable for smaller hull areas or touch-up work. While not as feature-rich in the description as some epoxy systems, Ez Fair offers predictable performance in typical repair scenarios, with standard curing behavior and sanding compatibility that make it a dependable addition to a boat repair toolkit.
Buying Guide: Key Purchase Considerations
- Material compatibility: Confirm whether the filler is formulated for fiberglass, wood, aluminum, steel, or composite laminates, and select accordingly for optimal bonding and longevity.
- Epoxy vs. polyester: Epoxy-based fairing compounds tend to offer stronger adhesion and better water resistance, while polyester fillers can be easier to work with for cosmetic repairs and feathering. Choose based on project needs and surrounding substrate.
- Cure time and workability: Consider working time, cure speed, and the temperature range in which you’ll be working. Faster cures help with quick turnovers, while longer pot life is advantageous for complex shapes.
- Sag resistance: For vertical or overhead surfaces, sag resistance is critical. Look for formulations explicitly designed to feather and hold a thin edge without dripping or sliding.
- Finish quality: A smooth, feathered edge that sands easily reduces finishing time. Check for claims about pinholes, voids, and hole-filling performance to ensure a seamless final surface.
- Repair scope: Large hull areas may require gallon or multiple-quart supplies, while small patches can be accomplished with quart or pint kits. Plan for future maintenance with compatible products.
- Compatibility with coatings: Ensure the fairing compound bonds well with your chosen topcoat (gelcoat, epoxy paints, or polyurethane finishes) to avoid delamination or poor adhesion.
- Application tools: Some formulations spread easily with a trowel or spreader, while others benefit from putty knives or specialized spatulas. Factor in your preferred method and available tools.
In marine repairs, choosing the right fairing compound hinges on project scale, substrate, and the required balance between ease of use and durability. The products listed here provide a range of epoxy and polyester options to support both rapid cosmetic fixes and more substantial structural repairs. Always follow label directions for mixing ratios, curing times, ventilation, and safety precautions to achieve sound, long-lasting results.