EP-76 Epoxy HDU Adhesive

EP-76 Epoxy HDU Adhesive is a two component epoxy bonding resin. It is designed to bond Precision Board to itself to make longer, wider, or thicker pieces, sheets, or blocks. EP-76 HDU Adhesive is available with a separate container of PB Granules to allow variable consistency and ease of machining. EP-76 HDU Adhesive will not shrink and can be machined, drilled, tapped, sawed, and feathered to a zero edge. It contains no metallic fillers, is a non-conductor of electricity, and will not promote electrolysis. EP-76 HDU Adhesive is suitable for interior and exterior exposure. The thickness consistency of EP-76 can be adjusted using PB-Granules to allow bonding of both horizontal and vertical surfaces. i.e.: edge bonding and sheet laminating. The durometer hardness and machinability of EP-76 can be adjusted and closely matched to the Precision Board densities by adding PB Granules as outlined in the PB EP-76 HDU Adhesive Product Data Sheet.

Quick tips for using using EP-76

  • Clean and dry surfaces to be bonded thoroughly
  • To increase bond strength, prime entire surface with ungranulated EP-76 HDU Adhesive thinned with 50% acetone and allow to cure thoroughly
  • Mix thoroughly until all streaks of color disappear: mix ratio is 27 hardner to 100 resin
  • Add granules according match density of Precision Board being bonded
  • Apply EP 76 with a putty knife, forcing material into the Precision Board surface
  • Pot life (working time for 100 grams) is about 60 minutes at 75°-80°F
  • Complete cure time: approximately 24 hr
  • Total and complete mixing is necessary for complete curing. EP-76 HDU Adhesive will remain soft & tacky without adequate mixing


  • Permanently edge bond HDU sheets together to create sheets of virtually any size
  • Permanently laminate sheets and blocks to create desired thickness and shape
  • Match durometer hardness and machinabilty to the specific Precision Board density
  • Waterproof bond line