EP37-3FLSP High-Performance, Two-Component Epoxy

Feb. 21, 2007

EP37-3FLSP is an optically clear, flexible, low viscosity, two-part epoxy system for large volume castings. It features 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. Volumes as much as 1 gallon and more can be readily cast at room temperature without undue exotherm development.


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 V/mil (1/8-in. thick sample). Tensile strength is around 1,000 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.

  • Superb optical clarity
  • Low viscosity
  • Highly flexible
  • Exceptionally long working life
  • Low exotherm during cure
  • Cures at room temperature