Surf Foil High Density Mast Insert

Product image 1Surf Foil High Density Mast Insert
Product image 2Surf Foil High Density Mast Insert

Regular price $ 79.19

Surf Foil High Density Mast Insert

Install this High Density Polyurethane Foam Foil Mast Insert into the bottom of your foil blank.

(2) 10.5" centerfin channels are epoxied in and reinforced with 6 oz. fiberglass cloth  spaced at industry standard 3.50" [90mm] apart on center to accept the foil mast base plate.

Use a 1 1/2" long router bit to install the insert.


12" x 5" x 1.50" deep

How to install a surf foil high density mast insert:

1. Trace the insert and hand route the pocket for a tight fit - or you can make a plywood template jig. If there's play in the box install lay pieces of fiberglass or carbon in the pocket to take up space and provide more support.
2. Install the insert with epoxy resin, tape over the finbox slots so resin doesn't get in and laminate a patch of fiberglass or carbon over the insert and the bottom of the board.
3. Cut through the reinforcement with a razor blade to remove the tape when the resin gels (about 45 mins - 1 hour). 

4. Tape over the finboxes again and sealcoat with epoxy resin

 Note: Channel box color may vary depending on stock (black or white)


Ask a Question
  • Is the foam on the foil mast insert and sup hand hold, able to be used with polyester resin

    Surf Foil High Density Mast Insert foam can be used with polyester resin.

  • how heavy is this ?

    The High Density Foil Mast Insert weighs 14 oz. with channel boxes installed

  • How far from the tail should the mount sit?

    Centered 12" from tail, under your back foot. The channel boxes allow the foil postion to be adjusted for optimal performance.

  • Fin boxes are monobloc molded ?

    High Density foam with plastic fin boxes installed

  • Can you use this with poly, or just eps? What type of resin would you use with poly?

    The high density surf foil mast can be inserted into EPS or Polyurethane foam cores. Use epoxy resin to set it in either type of foam.

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