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MEKP Catalyst Calculator & Mixing Guide (oz, mL, cc) MEKP Catalyst (Methyl Ethyl Ketone Peroxide) is used to cure polyester resin, vinyl ester resin, and gelcoat. The correct mix ratio is critical to ensure proper curing, strength, and finish quality. Standard mix: 1.5% MEKP (about 2 oz per gallon of resin). Important Mixing Notes This information is based on MEKP 925 and tested at 77°F (25°C) . These are estimates and may vary depending on the resin system, shop conditions, and ap...

Fiberglass Florida – Core Material Comparison Chart Compare our most popular core materials including Coosa, Divinycell, AirCell, and Honeycomb foam. Use this chart to choose the right material for your application based on strength, weight, water resistance, and compatibility with resin systems. Material Density (lb/ft³) Water Absorption Screw Retention Best Used For Resin Compatibility Coosa Bluewater 20–32 Very Low Excellent Transoms, stringe...

Gelcoat: What It Is, How It’s Used, and How to Repair It Gelcoat is the outermost protective and cosmetic layer used on fiberglass parts. Understanding how gelcoat works — and how to apply or repair it correctly — is critical to achieving long-lasting performance and professional results. What Is Gelcoat? Gelcoat is a pigmented polyester or vinyl ester resin applied to the surface of fiberglass parts. It creates a smooth, high-gloss finish while protecting the underlying laminate from wat...