Five Star Epoxy Chock EX is a three-component, extended epoxy chocking system built for precise equipment alignment in high-load, large-volume applications. It’s ideal for turbines, compressors, rotating equipment, and skid-mounted machinery in harsh industrial environments.
This 100% solids, solvent-free system combines a two-part epoxy resin with pre-measured aggregate to boost yield and enable deeper pours — without sacrificing strength or flow. As a result, it ensures full surface contact beneath machine baseplates, which helps eliminate the need for post-install machining and cuts down on overall installation time.
In addition, Epoxy Chock EX delivers high compressive strength at elevated temperatures. It resists chemicals, offers fire retardance, and remains dimensionally stable over time. These characteristics make it a reliable choice for critical alignment tasks in tough conditions.
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Key Features of Five Star Epoxy Chock EX
- Extended Volume Coverage
Pre-measured aggregate component increases the yield for larger pours and cost-effective chocking. - High Compressive Strength
Exceeds 20,000 psi post-cure, supporting heavy-duty equipment under static and dynamic loading. - Excellent Flow Characteristics
Pourable formulation ensures complete contact with baseplates, even in tight-clearance installations. - Reliable in Elevated Temperatures
Maintains strength and stability up to 230°F (110°C) for hot-running machinery. - Steel Chock Replacement
Provides nearly 100% bearing contact without the need for grinding or machining steel blocks. - Chemically and Thermally Stable
Resists common industrial chemicals and thermal cycling for long-term performance.
Recommended Uses for Five Star Epoxy Chock EX
Five Star Epoxy Chock EX is ideal for large-scale industrial installations that require precise alignment and durable, permanent support. Its extended formulation makes it especially useful where deeper pour depths or higher material yields are needed without compromising flow or mechanical strength.
Common applications include:
- Gas compressors and turbines
- Electrical generators and large motors
- Skid-mounted machinery and structural bases
- Heat-producing equipment requiring thermal resistance
- Replacement for steel chocking in precision settings
- Large volume placements in dynamic or high-vibration environments
Frequently Asked Questions
What’s the difference between Epoxy Chock and Epoxy Chock EX?
Epoxy Chock EX includes a third component—graded aggregate—that extends material volume. As a result, it’s better suited for larger pours while still maintaining strength and flow performance.
Can I use Epoxy Chock EX for hot-running machinery?
Yes. It retains its mechanical properties up to 230°F (110°C), making it a good choice for equipment exposed to thermal cycling or continuous heat.
What kind of surface preparation is required?
All contact surfaces must be clean, dry, and free of oil or contaminants. Steel edges should be ground smooth to prevent stress concentrations. Additionally, apply a release agent to areas that should not bond with the epoxy.
What is the recommended pour thickness?
The typical pour depth is up to 2½ inches (63 mm). For thinner or deeper pours — especially those under ½ inch (12 mm) or over 2½ inches — consult a sales representative for recommendations.
How long does it take to cure?
At 70°F (21°C), it reaches handling strength in about 24 hours. However, cure time will vary with temperature, so be sure to adjust expectations based on jobsite conditions.
Can Epoxy Chock EX replace machined steel chocks?
Yes. It offers near-100% surface contact, eliminates the need for machining, and often provides better vibration damping and alignment stability.
