The short answer:
Extruded Flex Core is a new type of extruded polystyrene foam. EFC is an alternative to the "standard" PU (Polyurethane) and to EPS (expanded polystyrene foam).
Need to know:
EFC is the result of a partnership between Hydroflex Surfboards and Marko Foam. To find out more, we caught up with Hydroflex's main man Rich Ciesco.
How is EFC different to EPS?
Rich: EFC (Extruded Flex Core) is an Extruded Polystyrene, which means it's extruded in square chunks out of a machine in long blocks. The cell structure is a closed cell foam, which means it won't take on air or water. EPS (Expanded Polystyrene) is made by putting polystyrene beads into a mold and adding steam to them to make them expand. These beads and the bonding between the beads is not air tight or water tight.
Is there any price difference for EFC foam boards vs EPS or PU?
How long has EFC been around for / what has the feedback been from surfers riding these boards?
Rich: We have been developing the foam for about a year now and all of the testing has received really positive feedback. The foam is very consistent and durable, making it a great choice for your go to shape.
EFC foam with Hydroflex's 3D vacuum-bagged glassing addresses 2 main concerns of every surfer out there: deck-denting durability and water-tightness in the event of a ding.
I want one for my next trip:
Hydroflex EFC foam is now available in your shape for all custom orders through REAL and is available with or without a stringer. For more info contact us at firstname.lastname@example.org.