Fin Box Voids

Discussion in 'Surfboards and Surfboard Design' started by MicNugget, May 19, 2020.

  1. MicNugget

    MicNugget New Member

    1
    May 19, 2020
    Hey guys, I'm new to this forum. I picked up a horrible rotten mess recently that I just finished cleaning up. It's a 6'6 polyurethane fish with major rot around the fin boxes. After deglassing the fin boxes practically fell out. I removed all the rotten foam away from the boxes and rails but now am left with less material than I expected. I'm considering all options: Microbaloons, Qcell, 4 lb polyurethane pour foam.

    What are the pros and cons of each. I obviously need something strong enough for fins.
    Thanks guys!!
     

    Attached Files:

  2. antoine

    antoine Well-Known Member

    Mar 10, 2013
    Oh man! So much ground to cover! But first we have a few questions for ya...ill let someone else go first
     

  3. La_Piedra

    La_Piedra Well-Known Member

    Oct 9, 2017
    I like your style dude. Excelsior.
     
  4. Notaseal

    Notaseal Well-Known Member

    Apr 18, 2015
  5. littlerhody

    littlerhody Well-Known Member

    443
    Jan 16, 2009
    Yes why did you buy the ducking board in the first place !
     
  6. Mitchell

    Mitchell Well-Known Member

    Jan 5, 2009
    That is the perfect application of pour foam. 4 lb density if fine. I've used it filling in huge voids to replace fin boxes. You can also use a mixture of resin and microballons to fill the voids


    [​IMG]
     
    Notaseal, La_Piedra and antoine like this.
  7. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    You can get 8 pound foam thats white ,the rest is piss yellow
    Also dap low density can foam is very white and excellent for holes
    I actually used it as an adhesive to glue up an eps board blank
     
    antoine likes this.
  8. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    Wet the old foam a bit before you use the pour foam it sticks better to old foam
    I just dampen it with a mist of distilled water ,not saturate it
     
  9. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    The corvid shit had me at the house so much i was bored so ive built 3 surfboards since april and workin on #4
     
    Notaseal likes this.
  10. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    Need a hook up for some 2 pound EPS block foam besides Greenlight
     
  11. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    I wouldnt put boxes back, really im over finboxes
    all my own boards nowadays have glassed on fins
    Mine are balsa glassed with 7.5 volan in a vacuum bag
    Boxes are good if your traveling and need to pop fins out or your a fin freak and have every fcs ,future fin they make
    In various carbon fibre whatevas
    fins are a lot stronger than the glass job on your board so the fins will rip out the box and some foam with it so i make mine to break off clean
     
    antoine likes this.
  12. antoine

    antoine Well-Known Member

    Mar 10, 2013
    I've been thinking about that a lit on my longboard but I like the options on my 7'2 custom mini me 4+1 but also would never need to change fins on any of my thrusters so I see the value on glasses in fins
     
  13. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    Ive never actually seen anyone change their fins unless they were broken or something and ive never seen anybody pull out different fins at the beach either
    But im sheltered
    I had a star sytems fin fall out one time during a little storm,
    it was a twin fin
    Mutha fukka
     
  14. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    Think i could only go right til i got another set of fins yknow unless i changed em cuz i wanted to go left
     
    Notaseal likes this.
  15. jaklsurfs

    jaklsurfs Well-Known Member

    501
    Apr 26, 2015
    Think im kiddin take out a twin fin with only one fin during some good swell