Interlux Paint Additives

Fine-Tune Your Finish with Interlux Paint Additives

When it comes to marine coatings, getting the paint onto the boat is only half the job. The other half is getting it right — the right sheen, the right texture, the right working properties for the conditions. That's exactly where Interlux Paint additives come in. As a brand with roots stretching back to 1881, Interlux has spent well over a century developing not just paints, but the companion products that help those paints perform at their peak in the demanding marine environment.

What Interlux Additives Do

Interlux's line of marine paint additives is purpose-built to work hand-in-hand with Interlux's own coating systems — giving boaters precise control over the final result. These products are not generic afterthoughts; they are formulated to integrate seamlessly with specific Interlux finishes, preserving the performance chemistry that makes those coatings reliable in saltwater, UV exposure, and constant weathering.

• Flattening Agents: Interlux offers dedicated flattening agents for both one-part and two-part finishes. The Flattening Agent YMA715 is a clear solution designed for mixing with Interlux one-part finishes like Brightside, Yacht Enamels, and varnishes to achieve gloss, satin, or matte effects without affecting drying or overcoating characteristics. For two-part systems, Interlux Flattening Agent for Two-Part Finishes is formulated specifically to reduce the high gloss of Interlux Perfection and Perfection Plus clear wood varnish — products where using a mismatched additive could compromise the entire coating's integrity.
• Non-Skid Additives: The Interlux Intergrip Non-Skid Compound is a synthetic-sphere additive blended into topside finishes before application — or sprinkled onto wet paint — to create a slip-resistant surface on decks and cabin tops. It is compatible with popular Interlux finishes including Brightside Polyurethane, Perfection Plus, and Premium Yacht Enamel, making it straightforward to match an existing color scheme while adding critical safety underfoot.
• Brush Reducers and Solvents: Products like Brush Reducer 2333N are slow-evaporating solvents engineered for use with specific two-part polyurethane and epoxy Interlux products. Choosing the right reducer can make the difference between a mirror-smooth finish and a paint that flashes off too quickly in warm weather. Interlux also offers faster-evaporating alternatives, giving applicators the ability to dial in pot life and workability for their specific conditions.

Why System Compatibility Matters

One of the most important considerations when using marine paint additives is compatibility. Interlux flattening agents, for example, are solvent-based and designed for oil-based systems — they are not interchangeable with water-based polyurethane products. Using a product outside its intended system can cause adhesion failure, improper cure, or a compromised finish. Interlux's additive lineup takes the guesswork out of this by clearly pairing each product with the specific coatings it supports, reflecting the same scientific discipline that has made Interlux a standard in professional boatyards worldwide.

Whether you are a weekend DIYer looking to add a satin finish to a varnished brightwork panel, or a boatyard professional tuning the application properties of a two-part polyurethane in changing weather conditions, Interlux additives provide the precision and reliability that experienced mariners expect from this storied brand.