TRUE COMPOSITES Fiberglass Polyester Resin Kit — 1 Gallon with MEKP Hardener, Marine-Grade Wet-Out

True Composites Fiberglass Polyester Resin Kit is a professional-grade one-gallon polyester laminating resin pack with MEKP hardener, designed for reliable fiberglass repairs, marine restoration, and composite fabrication.

Built to serve both hobbyists and professional shops, this polyester resin kit combines a one-gallon resin container with the appropriate MEKP catalyst to provide consistent wet-out, strong adhesion, and predictable cure times when mixed and applied per instructions. It’s formulated for common composite tasks—boat hull repairs, automotive panels, molds, and structural reinforcement—where a durable, tack-free finish is needed under correct application conditions.

How does this resin perform on marine and outdoor repairs?

The polyester formula is engineered for marine-grade applications, offering good adhesion to fiberglass and suitable resistance when used with proper gelcoat or topcoat systems. While not a replacement for specialized vinyl ester in extreme chemical environments, it’s widely used for hull repairs, stringer fixes, and fiberglass laminations on boats when applied correctly.

• Marine-grade polyester resin formulated for fiberglass laminates
• Wet-out properties help saturate cloth and mat for strong bonds
• Works with standard gelcoat and protective topcoats
• Best used where recommended corrosion and UV protection follows

What’s included and how do I mix and cure it?

The kit contains one gallon of polyester fiberglass resin and a tube or bottle of MEKP catalyst hardener sized for effective curing. Mix ratios vary slightly by ambient temperature and layer thickness; always follow the manufacturer's mixing instructions and safety guidance to achieve a tack-free cure.

• One gallon resin plus MEKP catalyst included in the kit
• Mix thoroughly to an even color, then add catalyst at recommended ratio
• Cure speed depends on temperature, catalyst amount, and laminate thickness
• Use in well-ventilated areas and follow PPE recommendations

Which materials and projects are best suited for this resin?

This polyester resin performs well with woven fiberglass cloth, chopped strand mat, and many common composite reinforcements for repairs and small-scale fabrications. Typical uses include boat hull and deck repairs, automotive fiberglass patching, mold making for non-critical parts, surfboard touch-ups, and reinforcing wood or metal substrates with fiberglass.

• Compatible with fiberglass cloth, mat, and common reinforcements
• Ideal for repairs, small molds, and FRP fabrication tasks
• Used for surfboards, auto panels, and wood reinforcement jobs
• Favored for cost-effective restoration and structural patching

Who is this for? True Composites Fiberglass Polyester Resin Kit is aimed at DIYers, marine repair shops, restoration professionals, and composite fabricators who need an economical, reliable polyester resin system for general-purpose fiberglass work. If you require chemical resistance beyond standard polyester capabilities or high-temperature performance, consider alternatives; otherwise, this kit provides a practical balance of wet-out, cure reliability, and value for everyday fiberglass repair and fabrication needs.