Interlux Paint Fairing Compounds

Interlux Paint Fairing Compounds: Professional-Grade Hull Perfection

When it comes to achieving a flawless, fair hull surface, few names carry the authority of Interlux Paint. As a division of AkzoNobel and one of the world's largest manufacturers of marine coatings, Interlux has built its reputation over more than a century of innovation in protective and finishing products for all types of vessels. Their fairing compounds are no exception — engineered to meet the exacting demands of both professional boatyard technicians and serious DIY boat owners.

The Interfill System: A Tiered Approach to Fairing

Interlux approaches hull fairing as a system rather than a single product, with the Interfill line designed to take a hull from raw repair all the way through to a paint-ready surface. Each product in the Interfill family has a specific role, and understanding that system is key to getting the best results.

• Interfill 830 Lightweight Epoxy Fairing Compound — The workhorse of the system and the premium choice for professional applicators. This two-component, light grey epoxy is engineered for profiling above and below the waterline on steel, aluminum, and composite hulls. Its standout feature is its ability to fill gaps up to 1 inch (800 mils) in a single coat without sagging or slumping — a critical advantage when addressing significant surface irregularities or structural repairs. Interfill 830 is sold as a two-part system (Base and Converter) that must be properly mixed at a 1:1 ratio.
• Interfill 833 Fast Cure Epoxy Finishing Fairing Compound — Where Interfill 830 handles heavy build, Interfill 833 Fast Cure steps in as the fine-finishing solution. Designed for use when a smooth, paint-ready surface is required, this 2-part epoxy putty can be applied above the waterline to prep surfaces before topside finishes, and also works below the waterline for blister filling and keel fairing systems. It can even be used to fill pinholes between coats of two-part polyurethanes.
• Interfill 833 Fine Finishing Fairing Compound — An easily sandable finishing filler, this product is used as the final step over Interfill 830 to correct any remaining minor surface defects before the finishing coats go on. Think of it as the finishing polish of the fairing world.

Why Interlux Fairing Compounds Stand Out

What sets Interlux fairing compounds apart is the depth of research and field testing behind them. Interlux dedicates more resources to research and development than virtually any other yacht paint manufacturer, with dedicated marine laboratories and customer-integrated testing programs ensuring each product performs in real-world conditions. The Interfill 830, for example, has been rigorously tested both in the lab and on the water by professional applicators before reaching the market.

Whether you're repairing storm damage on a fiberglass offshore cruiser, fairing a new keel installation on a performance sailboat, or addressing osmotic blisters on an older hull, the Interfill system gives boatyards and boat owners a trusted, proven path to a fair, smooth surface ready for any Interlux topcoat or antifouling system.

Explore the full range of Interlux Paint products, or browse all available fairing compounds to find the right solution for your hull project.