A Two Part Epoxy Features Optical Clarity, Flexibility and Exceptionally Low Exotherm For Large Casting Applications

Master Bond Polymer System EP37-3FLSP is a newly developed optically clear, flexible, low viscosity 2 part epoxy system for large volume castings. It features a long working life, low exotherm during cure as well as very low shrinkage and excellent dimensional stability. The EP37-3FLSP has a convenient non-critical mix ratio of 2/1 by weight. The “pot life” after mixing exceeds 10 hours. Depending on the volume of mixed compound, full cure at ambient temperatures occurs within 4 to 7 days. Volumes as much as 1 gallon and more can be readily cast at room temperature without undue exotherm development. Master Bond Polymer System EP37-3FLSP features outstanding electrical insulation properties, superior resistance to vibration, shock and thermal cycling. It bonds well to a variety of substrates including metals, glass, ceramics, most plastics and many elastomers.
EP37-3FLSP has a volume resistivity that exceeds 1014 ohm cm. The dielectric constant measures 4.6 and the dielectric strength exceeds 400 volts/mil (1/8” thick sample). Tensile strength is around 1000 psi and elongation is more than 30%. Shore D hardness measures 20. Water absorption is less than 1% after full immersion of 24 hours. Master Bond Polymer System EP37-3FLSP is an excellent choice for assuring the serviceability of large volume heat and shock sensitive electronic and/or electromechanical devices as well as optical assemblies and components.

About Master Bond
Master Bond Inc. is a leading manufacturer of advanced, state-of-the-art, industrial adhesives, sealants and coatings featuring high performance bonding, potting, encapsulation and underfill applications. Master Bond has developed a wide range of products for use in the electronic, medical, optical, aerospace and automotive applications, offering conformal coatings, electrically and thermally conductive adhesives and high temperature and chemically resistant compounds.