Crystic® Tooling Resin
Skin Coat VE679PA

Product info

Crystic® VE679 PA (Thix HV)

Highly Thixotropic Vinyl Ester Skincoat Resin for Superior Surface Finish

Crystic® VE679 PA (Thix HV) is a pre-accelerated, highly thixotropic, DCPD-modified vinyl ester resin developed for hand lay-up and spray lamination where surface finish, blister resistance, and print-through control are critical.

Specifically formulated as a vinyl ester skincoat, VE679 PA (Thix HV) provides excellent cure in thin laminates and can be applied to vertical or complex surfaces without drainage. When used as a skincoat beneath structural laminates, it significantly improves surface quality and long-term durability, making it ideal for marine, tooling, and swimming pool applications.

Key Features & Benefits

Highly thixotropic formulation

Enables application on vertical and contoured surfaces without sag or resin drainage

Optimised for skincoat applications

Achieves reliable cure in thin laminates with excellent surface quality

Reduced fibre print-through

Produces smooth, durable cosmetic surfaces beneath structural laminates

Excellent blister resistance

Supports long-term performance in marine and water-exposed environments

Hand lay-up & spray compatible

Suitable for manual and spray lamination processes

Improves final part appearance

Enhances surface finish and reduces post-finishing work

Applications

Crystic® VE679 PA (Thix HV) is recommended for:

Marine skincoats
Hulls, decks, and marine mouldings requiring enhanced surface finish
Tooling applications
Cosmetic surface layers beneath structural laminates
Swimming pools & wet-area structures
Where blister resistance and surface quality are critical
Hand lay-up & spray lamination processes
Cosmetic laminate layers
Used prior to structural vinyl ester or polyester backing laminates

Resin Properties (Uncured)

Appearance: Red / Brown
Viscosity (Thixotropic):
- ~2.5 dPa·s (ICI Cone & Plate @ 25°C)
- ~2550 mPa·s (Brookfield Spindle 3, 5 rpm @ 25°C)
- ~800 mPa·s (Brookfield Spindle 3, 50 rpm @ 25°C)
Gel Time @ 25°C:
- ~25 minutes with 2.0% Butanox® M50
Storage Stability: Up to 6 months at ≤20°C

Mechanical & Thermal Properties (Cured)

(Post cure applied)

Barcol Hardness: ~35
Heat Deflection Temperature (HDT): ~94°C
Tensile Strength: ~52 MPa
Tensile Modulus: ~3.0 GPa
Elongation at Break: ~2.1%

Processing & Handling

Crystic® VE679 PA (Thix HV) is pre-accelerated and designed for cold curing. It requires only the addition of a medium-reactivity MEKP catalyst, such as Butanox® M50, at 1.2–2.0%.

Important: Catalyst and accelerator must never be mixed directly together.

Post curing is recommended to achieve optimum chemical, water, and heat resistance before placing parts into service.

Packaging & Availability

20 kg pail
200 kg metallic drums
Bulk supply available on request

Technical Data Sheet

Crystic® Vinyl Ester Skin Coat Resin VE679PA

ATL Technical Support
ATL Composites provides technical support, catalyst selection guidance, and processing advice to ensure Crystic® VE 671-03 PA is correctly specified and optimised for chemical, thermal, and structural performance.

frequently asked questions

How does ATL tailor composite systems for different industries?

Every industry has distinct performance, compliance, and manufacturing requirements. ATL’s in-house chemists and engineers develop and refine epoxy systems, adhesives, and core materials to meet the specific demands of marine, defence, aerospace, automotive, industrial, civil, architectural, and sporting applications — ensuring every product delivers optimal strength, efficiency, and durability.

Can ATL customise materials for my project or process?

Yes. ATL offers custom formulation and process engineering support to align material performance with your production requirements — whether infusion, hand lay-up, lamination, bonding, or CNC-routed panel construction. Our technical team collaborates closely with customers to deliver precision-matched resin systems and structural solutions for unique applications.

Are ATL’s composite systems certified for high-performance applications?

Absolutely. ATL operates under an ISO 9001:2015-certified quality management system, with selected materials approved by DNV for use in structural and high-load applications. Every ATL system is manufactured to exacting standards of performance, consistency, and traceability to meet the demands of defence, industrial, and advanced engineering environments.

What makes ATL’s materials suitable for large-scale or structural builds?

ATL’s epoxy systems, structural panels, and composite cores are engineered for high strength-to-weight performance, dimensional stability, and fatigue resistance. These attributes make ATL materials ideal for large composite assemblies, modular structures, and precision-engineered components where long-term strength, weight reduction, and reliability are essential.

Does ATL offer sustainable or bio-based composite options?

Yes. ATL is committed to advancing sustainable composite technology, offering USDA-Certified Bio-Based epoxy systems and environmentally conscious materials that reduce waste, extend service life, and minimise environmental impact. Our ongoing R&D focuses on improving sustainability without compromising structural integrity or mechanical performance.

How can I select the right ATL system for my application?

Choosing the ideal composite system depends on your structure’s design, load requirements, manufacturing process, and environmental exposure. ATL’s in-house engineers and chemists provide tailored advice to ensure the correct combination of resin, core, adhesive, and surface technology for your project.
To discuss your application or request technical guidance, contact ATL’s Technical Team — we’ll help you identify the most effective and efficient composite solution for your build.

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