Polyester Resins are the most widely used resins in the composites industry. Sometimes referred to as Fiberglass Resins, Polyester Resins are less expensive, offer some corrosion resistance, and are more forgiving than epoxies. The majority of all fiberglass parts are constructed using Polyester Resins because they are easy to use, fast curing, and tolerant of temperature and catalyst extremes.

Premium polyester gel coats deliver top cosmetics and lasting durability for parts and molds. Choose from traditional gel coats including white, clear, and neutral, as well as tooling gel coats in orange and black. All of our gel coats offer incredible durability, and resist UV degradation and water absorption.

Scroll down for more general polyester resin information. To learn more about specific products and pricing, click on an image below.

Polyester Molding Resin

Polyester Molding Resin

General Purpose Resin for Part/Mold Fabrication
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Isophthalic Polyester Resin

Isophthalic Polyester Resin

Build Strength and Stability for Tough Parts
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White Gel Coat

White Gel Coat

Durable, Lasting Protection for Boats and Molds
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Clear Gel Coat

Clear Gel Coat

Get a Crystal-Clear, High-Gloss, Protective Finish
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Neutral Gel Coat

Neutral Gel Coat

Designed to Deliver Superior Color Qualities
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Orange Tooling Gel Coat

Orange Tooling Gel Coat

High Gloss and Superior Hardness for Molds

Black Tooling Gel Coat

Black Tooling Gel Coat

Build Lasting Durability for Molds

MEKP Hardener

MEKP Hardener

Industry Standard Catalyst
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Styrene Thinner

Styrene Thinner

General Purpose Styrene

Styrene Wax

Styrene Wax

Get a Complete Cure for Polyester Resins

Gel Coat Thickness Gauge

Gel Coat Thickness Gauge

Simple, Precise Measure for Gel Coat Thickness

Dry Gas Blanket

Dry Gas Blanket

Extend the Life of Liquids with One Easy Spray

#77 Polyester Molding Resin is a wax-free, general purpose fiberglass resin. This resin is a great choice for building low-cost molds, or for general fiberglass part fabrication. #90 Isophthalic Polyester Resin is a durable, dimensionally stable, corrosion resistant resin. The 225°F service temperature and low shrinkage properties of this resin are ideal for making dimensionally stable molds or extremely durable parts.

Want to learn more about Polyester Resins? Fibre Glast has a free Learning Center with helpful white papers like: About Resins, Mold Construction, Molding Fiberglass, and Fundamentals of Fiberglass. You can also contrast Polyester Resin with Epoxy Resin and Vinyl Ester Resin in the Fibre Glast blog article, Choosing the Right Resin.

Color Gel Coat

Proper gel coat application can be a challenge for professionals and is probably the most common problem area for those new to composite work. Save yourself some wasted time and material. Before starting your gel coat project, read through the Gel Coat Troubleshooting Guide in our free online Learning Center, to learn what common problems to avoid.

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