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Extruded Flex Core - Closed Cell Foam

The Extruded Flex Core by Hydroflex is a closed cell surfboard foam.
Hydroflex is stoked to unveil our partnership with Marko Foam and our new Extruded Flex Core (EFC) blanks. The closed-cell EFC blank is a groundbreaking progression of advanced surfboard construction. Developed specifically for surfboards, this state-of-the-art extruded polystyrene foam will stand up to the abuses of the ultramodern surfer better than any other blank out there. PU and EPS foam options will be still available. You now have the choice between three different foam cores to choose your next Hydroflex Surfboard with.

The EFC won't absorb water


Like XPS surfboard foam the EFC blank is closed-cell, which means it will not absorb any water.  EFC also features superior crushing strength, making boards less vulnerable to pressure dings, delamination, and rail/tail rot.  Excellent flex memory guarantees potent responsiveness that withstands the test of time.  EFC boasts consistent density throughout the entire blank, ensuring structural integrity and eliminating soft spots.

  • Closed cell formula
  • Won‘t absorb water
  • Superior crushing strength
  • Great flex memory & responsive feel
  • Impact and crush resistant
  • Consistent density eliminating soft spots

Four different Rocker templates available


The Hydroflex EFC blank is in stock now and available in four rocker templates. The blanks can be ordered stringerless, with 1, 2, or 3 ply AppelCore Stringers, or with another stringer of your choice.  This blank is 100% recyclable, environmentally sustainable, and produced responsibly using no harmful chlorofluorocarbons (CFC’s).