Five StarĀ® Epoxy Chock and Epoxy Chock Ex are epoxy chocking systems specifically engineered for use under integral gas compressors, skid mounted equipment, turbines, generators, and other critically aligned machinery. Five Star Epoxy Chock is a two component, 100% solids, solvent free material providing excellent flowability and high compressive strength at elevated temperatures and loading conditions. Five StarĀ® Epoxy Chock EX is a 3-part, extended version that is also solvent free with excellent flowability and high compressive strength at elevated temperature and loading conditions. Both systems are economical replacement for steel chocks because it eliminates costly machining and provides virtually 100% contact to machinery base plates.