FIBERLAM Plus 1-10G Polyester Resin 1-10 Gallon - Extended Tack Time

In this review the FIBERLAM Plus Polyester Fiberglass Laminating Resin is examined for DIYers and professional marine or auto repairers who need a reliable, low viscosity laminating resin with extended tack time. The bottom line: this is a marine-grade, Ortho-type polyester resin supplied with MEKP hardener that stands out for its longer working tack time and compatibility with a wide range of fibrous reinforcements, making it a practical choice for boat, RV, surfboard and general fiberglass construction or repair.

Key Features

• Marine-grade formulation: The resin is described as Grade A and intended for marine and RV use, offering a professional quality suitable for boatbuilders and serious hobbyists.
• Includes MEKP hardener: Each gallon purchased ships with a 2oz bottle of MEKP catalyst, simplifying mixing and ensuring buyers have the correct hardener on hand.
• Extended tack time: The resin stays tacky longer to allow easier stacking of reinforcement layers and better adhesion between plies during layup work.
• Low viscosity: Easy wet-out of fiberglass mat, biaxial, and cloth, helping the resin impregnate reinforcements quickly for hand layups or spray applications.
• Tack-free cure 24-36 hrs: The Ortho-type resin is formulated to cure tack free in 24-36 hours under normal conditions without wax, with cure speed adjustable via MEKP amount and temperature.

Who It's For

This resin is best for small shops, boat and RV owners doing repairs, and experienced DIY builders of watercraft, surfboards, or FRP parts who need a proven marine-grade polyester for laminating fiberglass and coring materials. The included MEKP bottles make it convenient for first-time buyers who may not already stock catalyst.

Users who need ultra-fast cure times in cold environments or who require a specialized resin (such as a vinyl ester or specific structural epoxy) should look elsewhere; the FIBERLAM Plus is an Ortho polyester resin, so its best fit is general-purpose laminating, repairs and new fiberglass parts rather than every specialty composite application.

Pros & Cons

Pros

• Marine-grade quality provides confidence for boat and RV repairs.
• MEKP hardener included per gallon makes mixing and job-start easier.
• Low viscosity and excellent wetting speed up layups and improve fiber impregnation.
• Extended tack time simplifies layering and reduces rush during laminating.

Cons

• Full cure depends on temperature and MEKP amount and may take 24-36 hrs or longer in cool conditions.
• As an Ortho polyester resin it is not a substitute for epoxies where superior structural bonding or moisture resistance is required.

Specifications

Product type	Ortho-type polyester laminating resin
Viscosity	Low viscosity for hand layup and spray
Cure time	Typically tack-free in 24-36 hrs (varies with MEKP and temperature)
Included hardener	2oz MEKP per gallon purchased
Applications	Marine, RV, auto body, surfboards, FRP parts, general laminating
Compatibility	Works with fiberglass mat, biaxial cloth, coring materials

Our Verdict

FIBERLAM Plus is a solid, value-oriented polyester laminating resin for anyone doing marine repairs or building fibrous composite parts. Its Grade A marine formulation, included MEKP per gallon, and long tack window make it especially useful for layered laminates and shop repairs, while its low viscosity aids wet-out. Buyers who need epoxy-level performance or rapid cures in cold conditions should consider alternatives, but for general laminating this resin delivers good performance and convenience.

Frequently Asked Questions

How much MEKP is included?
One 2oz bottle of MEKP hardener is supplied for each gallon of resin purchased.

How long until the resin is fully cured?
Under normal conditions it cures tack free in 24-36 hrs; cure can be faster with more MEKP and warmer temperatures or slower when below 72F.

What materials is it compatible with?
It is compatible with all common fiberglass reinforcements and many coring materials, suitable for boats, RVs, auto body, and general FRP work.