Complete
Tooling System
Plug-to-Mold
The POLYMOLD Composite Tooling System by Composite Essential Materials (CEM) is a comprehensive, high-performance solution for manufacturing durable, dimensionally stable, and precision-engineered fiberglass and composite molds. Designed for marine, automotive, transportation, recreational vehicle (RV), construction, and industrial composite manufacturing, the POLYMOLD System integrates a complete range of specialized composite tooling resins, tooling gelcoats, surface primers, sealers, and mold-building materials into one coordinated process. From initial plug preparation and surface sealing to tooling gelcoat application, laminate construction, and final mold finishing, each stage is designed to support efficient production, excellent surface quality, and long-term mold durability.
The system incorporates specialized products such as POLYSEALER, POLYSPRAY, POLYCORE, POLYPRIMER, POLYGEL, POLYGLOSS, and POLYMOLD ISO and POLYMOLD VE tooling resins to meet a variety of mold fabrication requirements. Whether developing prototype tooling, manufacturing custom fiberglass molds, or producing high-volume production molds, the POLYMOLD System helps composite manufacturers achieve consistent surface finishes, dimensional accuracy, structural integrity, and reliable mold performance, supported by CEM's composite materials expertise and technical guidance.
Engineered for Composite Manufacturing
Successful composite parts begin with quality tooling. The POLYMOLD System is designed to provide:
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Excellent dimensional stability
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Superior surface finish quality
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Consistent mold performance
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Efficient processing and fabrication
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Long service life
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Compatibility with a wide range of composite manufacturing methods
Our tooling materials work together as a complete system, helping fabricators reduce variability and achieve repeatable results throughout the manufacturing process.
Why Choose POLYMOLD?
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Complete System Approach
All components are selected to work together, simplifying material selection and improving process consistency.
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Technical Expertise
Our team understands composite manufacturing and can help identify the right tooling materials for your application.
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Proven Performance
Built for demanding composite environments where mold quality directly impacts production efficiency and final part quality.
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Manufacturing Support
From initial tooling design to production implementation, Composite Essential Materials provides the guidance and support needed for successful mold construction.
Plug Preparation
POLYSEALER
Hybrid Polyester Resin
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Outstanding compatibility with the polystyrene
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Creates a barrier between the styrofoam and the mold putty
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Rapid Barcol progression
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Excellent glass wet-out
POLYSPRAY
Polyester-based Sprayable Putty
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Low shrinkage and low exotherm system
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Easy build up for consecutive layers
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Low density for easy CNC machining
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Excellent bonding to POLYSEALER
POLYCORE
Extrudable Isophthalic Paste
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Low shrinkage to preserve the master dimensions
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Low exothermic peak to prevent surface distortion
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Easy to machine
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No dust or tear during machining
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Low VOC comparable with sprayable versions
POLYPRIMER
Sprayable Polyester Primer
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Excellent surface finish
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Good spreadability without run-off
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Good filling properties
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Outstanding sandability
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Good adhesion to mold putties/wood/tooling boards
Tooling Resin
POLYGEL
Vinyl Ester Tooling Gelcoat
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Substantial gloss-retention
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Good resistance to splitting
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Significant resistance to high temperatures
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Easy to degas
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Good elongation strength
POLYSKIN
Vinyl Ester Tooling Skin Coat
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Great in hand lay-up or spray-up application
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Creates a strong chemical barrier between the gelcoat and the tooling resin
POLYMOLD ISO
Isophthalic Tooling Resin
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Contains a color-change catalyst indicator
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Good wet-out
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Easy application
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Improved density
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No shrinkage
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No swelling effect
POLYMOLD VE
Vinyl Ester Tooling Resin
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Contains a color-change catalyst indicator
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Good wet-out
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Easy application
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Improved density
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No shrinkage
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No swelling effect