Suitable for large castings, Master Bond EP21LVSP6 combines a low viscosity and low exotherm with a working life of 3-5 hours. It can also be used for bonding, sealing and coating applications in aerospace, electronic, electrical, optical and other specialty industries. This two part epoxy offers has a non-critical one to one mix ratio, by weight or volume and its processing is facilitated with color coding-Part A is clear and Part B is amber clear. It is formulated to cure at room temperature or more rapidly at elevated temperatures. The epoxy bonds well to a variety of similar and dissimilar substrates such as metals, composites, glass, ceramics, rubbers and plastics. It has a tensile strength exceeding 7,000 psi and a tensile lap shear strength greater than 2,500 psi. The system is able to withstand chemicals including water, oil, fuel, acids and bases. It is a competent electrical insulator over the temperature range of -60°F to +250°F.