Top 3 Engineering Uses of Thermoset Composites

Thermoset composites are indispensable across commercial, industrial, and residential sectors. At the recent Automotive Composites Conference and Exhibition (ACCE), Martin Starkey, director of Gurit Automotive, highlighted that the wide array of resins and reinforcements makes composites “infinitely tailorable for any application.” However, selecting the optimal mix and process from the vast possibilities remains a challenge.

1. Aerospace and Automotive

Stringent regulations and fierce competition drive the adoption of thermoset composites in both automotive and aerospace. The push for lower emissions, combined with a demand for lighter, more efficient vehicles, has expanded their use more than ever.

In the automotive sector, glass‑reinforced polyester thermosets appear in body panels, seats, and interior trim. High‑performance vehicles often employ carbon‑fiber composites for wheels and critical under‑the‑hood components, thanks to their superior strength‑to‑weight ratio.

Aerospace applications are equally diverse. According to Dale Brosius, chief commercialization officer at the Institute for Advanced Composites Manufacturing Innovation (IACMI), thermoset composites dominate wind‑turbine blades and form the core structures of the Boeing 787 and Airbus A350. Carbon‑fiber‑intensive automotive bodies—from Italian supercars to the BMW i3—also rely on thermoset matrices.

Beyond vehicles, epoxy/carbon‑fiber composites power sporting goods such as archery shafts, tennis racquets, golf clubs, and ski equipment, where stiffness and durability are paramount.

2. Commercial and Residential Construction

Polyester and epoxy thermosets are staples in construction, appearing in everything from kitchen and bathroom fixtures to structural elements. Common uses include sinks, shower stalls, tub surrounds, doors, wall panels, roofing, window frames, molding, and even swimming pools. Their chemical resistance and durability make them ideal for long‑lasting, low‑maintenance building components.

3. Appliance and Electrical

In the appliance industry, thermoset composites underpin major household machines—dishwashers, refrigerators, washers, dryers, and small kitchen appliances. Everyday components such as oven handles, vent trims, control panels, and knobs are often made from polyester or epoxy composites, offering both functionality and aesthetic appeal.

The electrical sector benefits from phenolic‑matrix and melamine composites in printed‑circuit boards, gears, insulators, and other high‑temperature components. Silicone‑based composites, prized for their dielectric properties and heat resistance, are used in substation equipment, microwave antennas, and printed wiring boards. Key applications include switchgear, motor controls, standoff insulators, circuit breakers, arc shields, terminal blocks, metering devices, bus supports, and lighting components.

These examples only scratch the surface. Thermoset composites also thrive in agriculture, marine, HVAC, and plumbing, showcasing their versatility across industries.

Interested in how thermoset composites can elevate your project? Schedule a discovery call with one of our engineers.