FIBERLAM Plus Polyester Laminating Resin 1-10 Gallon - Extended Tack

In this review of FIBERLAM Plus polyester laminating resin, the bottom line is simple: this is a marine-grade, low viscosity resin for builders and repairers who need reliable wet-out, longer tack time, and included hardener. The reviewer found it best suited to boat, RV and automotive fiberglass lamination where working time matters, and appreciated that the set ships with MEKP hardener and a clear mix ratio chart. For projects that demand full cure without wax and predictable handling, this resin delivers consistent, professional results.

Key Features

• Marine grade formulation: Cures tack free in 24-36 hours and is manufactured to industry-grade standards so it works for marine and structural repairs.
• Low viscosity: Flows and wets fiberglass mat, biaxial cloth and woven fabric quickly for reliable impregnation and fewer dry spots.
• Extended tack time: Longer working time makes stacking layers and larger layups easier before the resin gels.
• Included MEKP hardener: Each gallon includes a 2 oz bottle of MEKP hardener so users have the correct catalyst on hand and a label mix chart for reference.
• Wide compatibility: Bonds well to wood, fiberglass and metal and accepts gelcoat adhesion for repairs or new parts.
• Made in USA: Ortho-type polyester resin produced domestically for consistent batches and predictable cure behavior.

Who It's For

This resin is aimed at hobbyists and professional builders who work with fiberglass on boats, RVs, surfboards, canoes and automotive panels and who need a marine-grade polyester that cures without wax. Its extended tack time and low viscosity benefit layups where multiple layers must be applied or when using thicker reinforcements such as biaxial cloth or mat.

Users who need an ultra-fast cure or a pre-waxed, tack-free product immediately under 24 hours should look elsewhere or add wax as suggested; similarly, epoxy purists seeking higher bond strength and moisture resistance in critical structural bonds may prefer epoxy systems.

Pros & Cons

Pros

• Marine-grade resin cures fully in 24-36 hours and does not contain wax by default.
• Low viscosity provides excellent wetting of fiberglass materials and reduces dry spots.
• Included MEKP hardener and clear mix instructions simplify setup for DIYers and pros.
• Longer tack window makes multi-layer laminations and vertical work easier.

Cons

• Full cure time depends on temperature and catalyst amount and can be slower below 72F, so warm working conditions are recommended.
• Not an epoxy alternative for applications that specifically demand epoxy performance characteristics.

Specifications

Product type	Polyester laminating resin (Ortho-type)
Viscosity	Low viscosity for wet-out
Cure time	Tack free in 24-36 hours (depends on MEKP and temperature)
Included hardener	MEKP 2 oz bottle per gallon
Compatibility	Fiberglass mat, biaxial/cloth, wood, metal, gelcoat
Applications	Marine, RV, automotive, surfboards, FRP parts
Origin	Manufactured in USA

Our Verdict

FIBERLAM Plus is a solid, value-minded choice for anyone doing fiberglass lamination who needs reliable wet-out, included hardener, and extra working time. It is especially good for marine and repair work where predictable cure and compatibility with gelcoat matter. For fast cold cures or structural epoxy-level strength choose a different system, but for general laminating this resin is good value and dependable.

Frequently Asked Questions

How much hardener is included?
The set includes a 2 oz MEKP hardener bottle for each gallon of resin purchased.

Will this resin bond to gelcoat?
Yes, gelcoat adheres well to this polyester resin and it is suitable for repairs and new gelcoat-over-resin workflows.

How long does it take to cure in cool conditions?
Cure can take longer than 36 hours if temperatures are below 72F or if less hardener is used; warm working temperatures speed the reaction.