Bespoke FRP Profiles Engineered to Your Specification

Every custom pultrusion begins with a detailed technical discussion. You share the cross-section geometry, loading conditions, operating environment, and target volume. Our engineering team evaluates the design for pultrudability, identifying potential issues such as wall-thickness ratios that could cause resin-rich zones, asymmetric fiber distributions that would lead to warping, or undercuts that would prevent die extraction. Within three business days, we deliver a feasibility assessment that confirms the profile can be manufactured to your requirements, or we propose design modifications that achieve the same functional outcome with superior manufacturability. This early-stage collaboration is where the most significant cost and performance gains are realized, and we encourage clients to engage our engineers before the cross-section geometry is locked in their design documentation.

Once the cross-section is agreed, our design engineers produce detailed production drawings and specify the complete fiber architecture: the number, type, and placement of unidirectional rovings, continuous strand mats, woven fabrics, and surface veils that will deliver the required mechanical properties. We use finite element analysis (FEA) to validate the structural performance of the profile under the specified loading conditions and to optimize the fiber-to-resin ratio for both strength and processability. The resin system is selected based on the chemical environment, thermal exposure, fire performance requirements, and regulatory constraints of the end application. At this stage, we also define the quality inspection plan: the dimensional tolerances, mechanical test schedule, and acceptance criteria that will govern production approval.

The pultrusion die is the heart of the process, and we design and manufacture all tooling in-house using CNC-machined tool steel. Die design is not simply a matter of cutting the profile cavity: we engineer the taper geometry, heating zone placement, and chrome plating specification to control resin gel progression, minimize surface defects, and ensure consistent fiber wet-out across the entire cross-section. For complex multi-cavity profiles, we design modular die systems that allow individual cavities to be maintained or modified without replacing the entire tool. Guide plates and preformers are designed simultaneously to align and tension the incoming fiber reinforcement before it enters the die, which is critical for maintaining fiber alignment in profiles with thin walls or asymmetric geometries. Tooling costs are a one-time investment that is amortized over the production life of the profile.

Before committing to full production, we conduct a trial run using the production die and the specified raw materials. The trial validates every aspect of the process: pull speed, die temperature profile, resin bath viscosity, fiber tension, and cutting parameters. We produce sample lengths that are subjected to the full quality inspection plan, including dimensional measurement at multiple cross-section locations, mechanical testing (tensile, flexural, compressive, and interlaminar shear), visual inspection for surface defects, and Barcol hardness testing as a proxy for cure completeness. You receive the trial samples and full test report for review. Production proceeds only after you approve the trial results, ensuring that the first production run meets your specification without iteration or waste.

With validated tooling and process parameters, we transition to series production. Our production lines run continuously, and we allocate dedicated line time for each custom profile to maintain traceability and prevent cross-contamination of fiber or resin types. Every production batch is tested in accordance with the approved quality plan, and certificates of conformance accompany each shipment. We maintain your die tooling in our tool library for the life of the product, ready for repeat orders with minimal lead time. For clients with predictable demand patterns, we offer scheduled production agreements that lock in capacity and pricing, ensuring supply continuity even during periods of high market demand.