Find the right marine epoxy fairing compound to smooth hulls, repair dents, and feather edges on fiberglass, wood, and metal surfaces. This guide highlights five reliable products, ideal for boaters, DIYers, and professional restorers who need durable, waterproof finishes above or below the waterline. Each pick includes who it’s best for, why it’s chosen, and a practical caveat to consider.
| Product | Size | Best For |
|---|---|---|
| TotalBoat TotalFair Marine Epoxy Fairing Compound | 2 Pint | Lightweight, high-strength repairs on small to medium spots |
| TotalBoat TotalFair Marine Epoxy Fairing Compound | 2 Gallon | Larger fairing jobs or hull restoration |
| MAS Epoxies Fairing Compound | 2 Pint | Pre-mixed, ready-to-use on vertical surfaces |
| MAS Epoxies Fairing Compound | 1 Gallon | DIY boat projects with extended work time |
| PC-Products PC-11 Epoxy Adhesive Paste | ½ lb (two cans) | Robust bonding and fairing across multiple materials |
TotalBoat TotalFair 2 Pint Kit
Product features include a high-strength, lightweight two-part epoxy filler that smooths rough spots and fills voids on boats, canoes, or other watercraft. It provides a super-smooth, waterproof finish and cures without pinholes on wood, aluminum, steel, and fiberglass. The formula uses a simple 1-to-1 mix ratio—blue and yellow components turn green when ready. It resists sagging on vertical and overhead surfaces. Best for small-to-medium repairs where a durable, waterproof edge is needed. Caution: ensure surfaces are clean and dry before application to maximize adhesion.
TotalBoat TotalFair 2 Gallon Kit
This gallon-size option shares the same high-strength, lightweight two-part epoxy formulation as the pint kit, making it ideal for larger fairing jobs, hull smoothing, and extensive repairs above or below the waterline. It also features the easy 1-to-1 mix and a waterproof cure. Best for serious projects or professional use where volume savings matter. Limitation: slightly larger kit may require more storage space and longer curing times for big applications.
MAS Epoxies Fairing Compound (2 Pint)
MAS Epoxies offers a pre-mixed fairing epoxy designed for easy sanding and excellent sag resistance, making it suitable for vertical or uneven fiberglass and marine panels. It’s a strong choice for boat fairing, hull smoothing, or body filler replacement. Best for users who want ready-to-use epoxy without extra fillers. Caution: verify that the surface is stable and dry to prevent pinholes or pinching in the finish.
MAS Epoxies Fairing Compound (1 Gallon)
This larger MAS kit mirrors the pint version’s ready-mixed, non-sag formula and easy sanding characteristics. It’s well-suited for bigger projects such as fairing hulls or decks where a consistent texture helps achieve a smooth finish. Best for DIYers tackling long runs or full-boat repairs. Limitation: larger bulk may require more careful storage and longer clean-up for thorough feathering.
PC-11 Epoxy Adhesive Paste (Two Can Pack)
PC-11 is a two-part marine epoxy adhesive paste that bonds many materials in dry, wet, and underwater environments. It can join fiberglass, various metals, concrete, glass, ceramic, and rubber, and is suitable for indoor and outdoor projects. Best for multi-material repairs or structural bonding near marine hardware. Caution: epoxy pastes require accurate mixing and proper curing conditions to maximize strength; always follow mixing ratios and cure times.
Buying Guide
What application size are you tackling?
For small repairs, a 2-pint kit is usually sufficient and easier to handle. For larger patches or hulls, a 1-gallon or 2-gallon option provides more working material and consistent results across larger areas.
Do you need ready-to-use epoxy or a two-part mix?
MAS Epoxies’ pre-mixed formula appeals to users who want minimal preparation and predictable work time. TotalBoat TotalFair products also use a simple 1-to-1 mix, which is friendly for beginners. If you require a strong multi-material bond, PC-11 offers robust adhesive paste capabilities beyond filler use.
Where will you apply the repair?
All listed products are designed for marine use, with emphasis on above- and below-waterline performance. If you plan to repair concerns around vertical surfaces or billowed edges, prioritize low-sag formulations like the MAS or TotalBoat options with proven feathering capabilities.
Do you need waterproof or saltwater durability?
Both TotalBoat TotalFair and MAS epoxies emphasize waterproof cures suitable for marine environments. If water exposure is a primary concern, confirm the product’s cure profile and ensure the substrate is properly prepared for maximum adhesion and water resistance.
What about ease of sanding and finishing?
Choose products highlighted for easy sanding after cure to minimize dust and accelerate top-coating readiness. Pre-mixed options from MAS are particularly convenient when sanding is a priority.
Storage and shelf life considerations
Two-part epoxies require proper storage to prevent premature hardening. Keep containers sealed and protected from temperature fluctuations. For larger kits, ensure space is adequate to avoid moisture exposure and accidental mixing by children or pets.
Comparison snapshot
- Best for small quick fixes: TotalBoat TotalFair 2 Pint
- Best for large projects: TotalBoat TotalFair 2 Gallon
- Best ready-to-use option: MAS Epoxies Fairing Compound 2 Pint
- Best for DIY, large-volume jobs: MAS Epoxies Fairing Compound 1 Gallon
- Best multi-material bond: PC-11 Epoxy Adhesive Paste
Frequently Asked Questions
- What is the main difference between epoxy and polyester fairing compounds?
- Can epoxy fairing compounds be sanded after curing?
- Are these products suitable for underwater repairs?
- Do I need to mix epoxy components yourself?
- How do I choose between pint, quart, and gallon sizes?
- Is there any safety guidance for using marine epoxy fillers?
Epoxy fairing compounds generally offer stronger adhesion, better water resistance, and superior bonding to multiple materials, while polyester fillers are often easier to apply and cure quickly above the waterline.
Yes. Most epoxy fairing compounds are designed to be sanded to a feathered edge for a smooth topcoat surface.
Many marine epoxy fillers can cure underwater or in damp conditions, but follow product instructions for best results and ensure adequate curing in the intended environment.
Some products are pre-mixed ready-to-use, while others require a 1:1 or specified mix ratio. Always follow the manufacturer’s mixing directions for proper cure and strength.
Consider the repair area size and whether you’ll perform multiple projects. Pints work well for small fixes; quarts are versatile for mid-size jobs; gallons maximize value for large decks or hulls.
Wear appropriate PPE, ensure good ventilation, and avoid skin contact. Read the product label for specific safety instructions, curing times, and disposal guidance.