The Cheapest Composite Material Isn't Always the Cheapest

When purchasing composite materials, it can be tempting to focus on one number: the price per pound. Keeping material costs competitive is important for every manufacturer, but the lowest purchase price does not always result in the lowest overall manufacturing cost. In fiberglass and composite manufacturing, the true cost of a material can be influenced by processing characteristics, labor, waste, production efficiency, finished-part performance, and long-term durability.

For manufacturers looking closely at their margins, this distinction can be significant. A material that costs slightly more upfront may ultimately save money if it processes more efficiently, produces less waste, reduces labor requirements, or provides better long-term performance. Conversely, a material that appears inexpensive can become considerably more expensive when additional processing time, scrap, rework, or performance problems are factored into the equation.

Looking Beyond the Purchase Price

Consider two resin systems that appear to be comparable. One has a lower price per drum, while the other costs somewhat more. At first glance, the less expensive resin seems like the obvious choice. However, what happens if the lower-cost resin has a shorter working time, creates more processing challenges, requires additional labor, or produces more waste?

The initial savings can quickly disappear.

The same principle applies to fiberglass reinforcement and other composite materials. A reinforcement may have a lower price per pound, but if it is difficult to handle, requires additional cutting, doesn't wet out efficiently, or isn't well suited to the manufacturing process, the material may cost more to use than its purchase price suggests.

For this reason, manufacturers should consider the entire production process when evaluating materials rather than comparing products solely on their quoted price.

Five Factors to Consider When Choosing Materials

Application requirements. The first consideration should always be the finished product. What will it be used for, and what performance characteristics does it need? A marine component, agricultural tank, swimming pool, and cultured marble product can have very different material requirements.

Environmental exposure. The environment in which a finished product will operate can have a major influence on material selection. Exposure to saltwater, freshwater, chemicals, UV radiation, temperature fluctuations, moisture, or other demanding conditions may require a specific resin, reinforcement, surface system, or combination of materials.

Manufacturing process. Materials need to work with the way a product is actually manufactured. Hand lay-up, spray-up, vacuum infusion, RTM, and other composite manufacturing processes have different requirements. Resin viscosity, working time, cure characteristics, reinforcement architecture, and permeability can all influence production efficiency.

Finished-part performance. A material that costs less but does not provide the required performance is rarely a good value. Depending on the application, manufacturers may need to consider impact resistance, flexibility, structural strength, chemical resistance, water resistance, temperature resistance, or long-term durability.

Waste and labor. These costs are easy to overlook because they don't necessarily appear on a material quote. However, even small increases in labor or material waste can have a meaningful effect when multiplied across hundreds or thousands of parts.

Consider the Entire Composite System

Composite manufacturing is rarely about one material in isolation. A finished component may involve resin, fiberglass reinforcement, core materials, fillers, additives, gel coat, adhesives, and other consumables. These materials are part of a system, and the performance of one can affect the processing and performance of another.

That means material selection should begin with the finished application and manufacturing process rather than with a single product's price.

A manufacturer may discover, for example, that a different reinforcement allows a laminate to achieve the required performance with less material. Another manufacturer may find that a resin with slightly higher upfront cost reduces production problems enough to lower the total cost per part. In another application, the most economical solution may simply be the lower-cost material because it already provides everything the finished product requires.

There is no single answer that applies to every application.

The Goal Is Value, Not Simply Low Cost

Competitive pricing will always be important in manufacturing, but price should be considered alongside performance, consistency, processability, waste, labor, and durability.

The best material choice is the one that provides the right combination of these factors for the specific application.

In other words, manufacturers should ask not only, "What does this material cost?" but also, "What will this material cost us to use?"

That distinction can lead to better purchasing decisions, more efficient production, and a better finished product.

At Spectra Composites, we believe material selection should begin with understanding the application, manufacturing process, and performance requirements. Our goal is to help manufacturers find composite material solutions that balance performance, efficiency, availability, and cost.

Because the cheapest material isn't always the cheapest solution. Sometimes, the right material is the one that delivers the best overall value.