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 coat delivers superior cosmetics and durability for parts and molds. Choose from traditional gel coats such as white, neutral, and clear, as well as orange or black tooling gel coats. All of our gel coats resist UV degradation and water absorption. To learn more about gel coat please visit our Learning Center articles "Gel Coat Application Guide" and "Gel Coat Troubleshooting Guide".
Shop our selection of polyester resins, gel coats, spray guns, and supplies below!
#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 and extremely durable parts.
Want to learn more about Polyester Resins? Fibre Glast has a free Learning Center with helpful white papers, including: About Resins, Mold Construction, Molding Fiberglass, and Fundamentals of Fiberglass. You can also compare Polyester Resin with Epoxy Resin and Vinyl Ester Resin in the Fibre Glast blog article, Choosing the Right Resin.
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 the common problems to avoid.
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