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CoREZYN® Resins

Corrosion Resistant Vinyl Ester Resins

Closed Molding Resins

High Tg resins, used where outstanding retention of properties at elevated temperatures is required. Chemically thickenable so they can be formulated into SMC and BMC resins with conventional thickeners.


The CoREZYN COR75 Series isophthalic resins perform well in high temperatures, have good fatigue performance, are stronger and more corrosion resistant than polyester resins, and are more cost effective than a vinyl ester. Our isophthalics are excellent choices for parts that are exposed to road salt and sand, engine fluids, heat, and weather.

Premium-grade CoREZYN isophthalic resins are formulated specifically for high corrosion resistance and excellent physical properties. This versatile line is an outstanding performer for tooling and mold making, filament winding, steel tank overwrap, spray-up/lay-up and cured-in-place pipe applications.

Interplastic offers COR75-AQ-460, a MACT-compliant, corrosion resistant resin. This product is a recognized component for Underwriter Laboratories, Inc. UL 1746 External Corrosion Protection Systems for Steel Underground Storage Tanks and for UL 1316 Glass Fiber-Reinforced Plastic Underground Storage Tanks for Petroleum Products. This resin has been tested by UL and is approved for storing alcohol and gasoline/alcohol blends in these applications.


Promoted, thixotropic, FDA approvable, this series demonstrates good acid resistance, moderate solvent resistance, good temperature resistance, and high strength. It is generally chosen for mild to medium corrosive applications.

COR71 Series

An excellent tooling resin.

COR72 Series

Formulated specifically for Cured-in-Place Pipe (CIPP) applications.

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