Polyester Laminating Resin

Polyester Laminating Resin
Get the job done right with this easy-to-use polyester laminating resin—perfect for fiberglass projects, repairs, and custom builds. It spreads smoothly, cures strong, and creates a durable, high-quality finish every time. Available in both quart and gallon sizes, so you can grab just what you need whether you're tackling a quick fix or a bigger project. Reliable, versatile, and ready when you are.

Features & Benefits:

• Smooth application – Low-viscosity formula wets out fiberglass cloth and mat with ease

• Strong, durable cure – Forms a rigid, high-strength laminate with excellent adhesion

• Air-inhibited (tack-free layering) – Designed to remain slightly tacky between layers for better bonding without sanding

• Fast cure time – Catalyzes quickly with MEKP (methyl ethyl ketone peroxide) for efficient workflow

• Versatile use – Ideal for marine, automotive, and general composite builds

• Multiple size options – Available in quart and gallon sizes

• User-friendly – Simple mix ratio and consistent performance

Technical Details:

• Resin Type: Orthophthalic Polyester Laminating Resin

• Catalyst: MEKP required (included)

• Mix Ratio: Typically 1–2% MEKP by weight (adjust based on temperature and desired cure time)

• Viscosity: Medium-low for optimal fiber wet-out

• Gel Time: 30-40 minutes depending on catalyst ratio (1%) and temperature

• Cure Time: Initial cure in 2 hours at 176 F; full cure within 24 hours

• Finish: Non-waxed (tacky surface) for superior interlaminar adhesion

• Compatibility: Works with fiberglass mat, cloth, and woven roving

• Application Temperature: Recommended 65–85°F (18–30°C)

• Shelf Life: Up to 6 months when properly sealed and stored in a cool, dry place