Hysol HD3404 is a two-component, low viscosity, high heat distortion, potting and encapsulating epoxy with low shrinkage, low expansion, good strength and excellent electrical properties. LOCTITE® STYCAST EE 4215/HD 3404 is an undiluted, silica filled epoxy casting compound, which exhibits improved thermal properties, lower shrinkage and lower expansion characteristics. The undiluted resin exhibits a higher heat distortion, lower moisture absorption, lower shrinkage and lower expansion characteristics than obtainable with a diluted resin.