Triple Resin Technology Built for Rail

TriFLEX™ is engineered for exterior rail applications where long-term durability, weatherability, and mechanical performance matter. Built on advanced polymer technology, it combines three powerful resin systems to deliver strong chemical resistance, excellent UV stability, and industry-leading flexibility and impact resistance.

This balanced technology helps protect railcars against harsh service conditions, from mechanical stress and impact to prolonged environmental exposure. Backed by technical documentation and expert support, TriFLEX™ provides a reliable, high-performance solution for exterior railcar protection.

TriFLEXTM Tank Car Side Center Band Custom

TriFLEX HL

TriFLEX HL (Hopper Lining) is a one-coat, direct-to-metal, BPA-free interior lining engineered for hopper cars transporting plastic pellets and qualifying dry food-grade cargoes. It streamlines application while delivering flexibility and impact resistance for repeated loading, unloading, and transport.

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02Why It Matters

Built for Hopper Car Interiors

TriFLEX HL brings APC's triple-resin coating technology inside the hopper car.

Specifically formulated for dry-bulk transportation, it creates a durable protective barrier designed to withstand abrasion, impact, vibration, atmospheric exposure, and the repeated loading and unloading conditions encountered in rail service. Its smooth, blue finish provides a clean, easily identifiable lining surface for hopper cars carrying plastic pellets and qualifying dry food-grade materials.

Triple-Resin Performance—Inside the Car

TriFLEX HL combines three complementary resin technologies to balance mechanical strength, flexibility, impact resistance, and long-term durability. This integrated technology helps the lining withstand the movement, vibration, abrasion, and service conditions experienced by hopper cars without sacrificing protective performance.

03Engineered for Dry-Bulk Cargoes

TriFLEX HL is intended for interior hopper car applications carrying dry materials, including:

Primary Industries

Plastic pellets and polymer resins
Qualifying dry food-grade ingredients
Other approved dry-bulk cargoes
TriFLEX HL is not intended for liquid or wet food-contact service. Cargo suitability should be confirmed with APC Technical Services before specification or application.

07Frequently Asked Questions

Common questions, answered.

What is Triple Hybrid Technology?

TriFLEX combines three resin systems in a single coating: a Polyurethane resin for UV stability and weather resistance, a Polyaspartic resin for industry-leading dry time, and a unique polymer blend for impact resistance, corrosion resistance, and flexibility.

What climates is TriFLEX® suitable for?

Medium to high corrosion environment for mostly land-based structures. TriFLEXhas been extensively tested and rated to provide decades in a C4 environment, the harshest environment for anything not considered offshore.