CEM Resin Solutions

Versatility and Reliability

Composite Essential Materials offers a reliable line of general purpose resins designed to meet the everyday needs of composite manufacturers and fabricators. Our resin selection includes high-quality polyester and vinyl ester resins that deliver dependable performance across a wide range of applications. Whether you're working on marine, automotive, construction, or industrial projects, our resins provide excellent strength, durability, and ease of use. Formulated for consistent curing, optimal adhesion, and smooth laminating, these versatile resins are a trusted choice for fiberglass layups, repairs, and production runs. Backed by our commitment to quality and customer service, CEM’s resin helps you build with confidence.

Polyester

Resin

Open-Mold Systems

CEM’s Open-Mold Resins are formulated for reliable performance in traditional composite manufacturing processes such as hand lay-up and spray-up. These resins provide excellent wet-out of reinforcement fibers, consistent curing behavior, and strong mechanical performance for a wide range of composite applications. Designed for ease of use and dependable processing, CEM’s open-mold resins help manufacturers produce durable, high-quality parts with good surface finish and efficient shop-floor handling.

General Purpose Resin

CEM 200

100% Orthophthalic Resin

Outstanding secondary bonding
Blue catalyst indicator
Fast glass wet-out

CEM 250

DCPD/Orthophthalic Resin

Excellent mechanical properties
Superior surface cosmetics
Rapid Barcol progression
Low VOC

CEM 550

DCPD/Isophthalic Resin

Enhanced mechanical properties
Superior elongation for resilient part
Higher resistance to water osmosis
Low VOC

Premium Resin

CEM 500

100% Isophthalic Resin

Corrosion resistance
Very good resistance to osmotic blistering
Rapid Barcol progression
Superior glass wet-out

CEM 100

100% Vinyl Ester Resin

Superior corrosion resistance
Outstanding resistance to osmotic blistering
High HDT
Excellent mechanical properties

Close-Mold Systems

CEM’s Close-Mold Resins for Infusion are engineered for high-performance composite manufacturing using processes such as vacuum infusion and resin transfer molding (RTM). These resins offer excellent flow characteristics for efficient fiber wet-out, low viscosity for consistent mold filling, and controlled cure profiles that support complex part geometries and large structures. Designed to deliver strong mechanical properties, durability, and high fiber volume fractions, CEM’s infusion resins help manufacturers achieve reliable, high-quality composite parts with reduced void content and improved surface finish.

CEM I-380 Series

DCPD/Orthophthalic Resin

Fast fill time for vacuum infusion systems
Improved surface quality
Low shrinkage

CEM I-200 Series

Modified Vinyl Ester Resin

Excellent mechanical properties
Superior cosmetics
Outstanding resistance to osmotic blistering
Fast curing

CEM I-100 Series

High Performance Vinyl Ester Resin

Outstanding mechanical properties
Low viscosity and medium reactivity for less foaming
Outstanding resistance to osmotic blistering