904-001 Duratec Clear Hi-Gloss Additive for Gelcoat (Gallon)

High-Gloss Surface Enhancement – Improves gloss, depth, and flow of gelcoat and polyester resins for a smoother, more professional finish with reduced orange peel.
Improves Spray & Brushability – Thins and conditions gelcoat for easier application, better atomization when spraying, and improved leveling during brush or roller use.
Reduces Post-Finishing Work – Helps minimize sanding and buffing by producing a higher-gloss surface straight out of the mold or repair application.
Compatible With Gelcoat & Polyester Systems – Designed for use with polyester gelcoats and laminating resins; ideal for molds, repairs, and cosmetic surface work.
Trusted Marine & Composite Additive – Commonly used in marine, automotive, aerospace, and composite fabrication environments for consistent, high-quality results.
Professional-Grade Duratec Formula – Industry-proven additive used by builders and repair pros to achieve showroom-quality finishes.

You'll get a superior finish, add quality and save time and labor with Duratec Polyester Hi-Gloss Additive. Low Porosity---when used for repairs, blending the additive with gelcoat produces a low porosity surface. Reduced orange peel---the low viscosity of the blend results in a smooth finish that is easily sanded. Improved properties---for mold surfaces, the blending of the additive with tooling gelcoat creates a higher heat distortion temperature, improved gloss retention, increased impact resistance and reduced subsurface porosity. Superior finish---when blended one-to-one with gelcoats, the additive creates an air-cure, enamel-like coating. No air-dry additive is required. When used for gelcoat repair, surfaces are restored to like-new condition. Use a Non-Wax Gelcoat with this product.