Repair a Cracked or Buckled Polyurethane Surfboard

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Apply mixture over the foam. Do not worry about overflowing slightly onto the board as this will be sanded off. However, do try to avoid runs.
Allow mixture to cure for 1.5 hours.
Repeat on the other side of the board.
You may want to place a piece of tape towards the rail to stop the resin from flowing over the rail. We will glass the rail in the next step.

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