top of page
Iso UPR Liquid 4

Isophthalic Polyester Resins

Superior Strength & Chemical Resistance

For demanding environments where durability and performance matter, our isophthalic resins provide higher resistance to heat, chemicals, and mechanical stress compared to standard orthophthalics.

When Performance Outweighs Cost

Isophthalic resins are designed for applications requiring higher mechanical properties and corrosion resistance than general-purpose orthophthalics. They are the resin of choice in marine, chemical, and industrial applications where reliability and durability are critical.

Happy Composites delivers ISO 9001:2015 certified isophthalic resins from Grupo Químico Industrial de Toluca with full U.S. distribution and compliance, removing import risks while ensuring consistent quality.

Key Properties

Applications

Marine

  • Boat hulls and decks

  • Gelcoat bases and laminates

  • Marine repair materials

Industries Served

  • Marine & Transportation: boats, yachts, automotive parts

  • Industrial & Chemical Processing: tanks, pipes, chemical equipment

  • Construction & Infrastructure: corrosion-resistant FRP structures

Certifications & Standards

  • ISO 9001:2015 certified manufacturing

  • Tested against:

    • ASTM D638: Tensile Properties

    • ASTM D648: Heat Distortion Temperature (HDT)

    • ASTM D790: Flexural Properties

  • ​Recommended for ASTM C581 (chemical resistance of thermosetting resins)

  • Formulations available with low-styrene emissions (LSE) or no-styrene for regulatory compliance

Why Happy Composites for Isophthalics

  • Premium resins with proven performance in demanding environments

  • U.S.-based distribution with full import compliance

  • Technical expertise for marine, chemical, and construction projects

  • Reliable supply chain with consistent batch quality

Need a Resin That Can Handle More?

Our isophthalic resins are built for environments where performance cannot be compromised. Contact us to find the right grade for your project.

bottom of page