Master Bond Polymer System EP21LSCL is a two component, low viscosity epoxy resin system featuring optical clarity and non-yellowing properties for high performance coating, bonding, sealing and casting. It is formulated to cure easily at room temperatures or more quickly at elevated temperatures. Master Bond EP21LSCL is 100% reactive and does not contain any solvents or other volatiles. It readily develops high physical strength properties and good chemical resistance to water, acids, alkalis, salt, fuels and many organic solvents. It bonds well to metals, glass, ceramics, wood, vulcanized rubber and many plastics.

The EP21LSCL system is a very good for electrical insulator. The cured polymer exhibits excellent gloss and optical clarity even after two years Florida outdoors exposure especially when compared with other commercially offered epoxy resin compositions. It is therefore recommended for outdoor service or applications requiring superior performance and color retention upon long term service. Master Bond EP21LSCL's substantially improved weathering properties and color retention are due to the unique chemical structures of both the resin and the curing agent components. Service temperature range is from -65°F to +250°F.