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Boat Floatation Options

Discussion in 'Boats, Blinds, & Gadgets Forum' started by Holland, May 5, 2018.

  1. Holland

    Holland Refuge Member

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    Bay Area, CA
    Anyone have recommendations on where I can purchase flotation that can go under the seats of an aluminum boat? I recently picked up a 16' jon boat that I'd like about 1200lbs of flotation for.

    All the options I've seen are extortionately expensive. So far, Urethane pour foam from US composites seems the least pricey at $340 or so shipped.

    Any other good options?
     
  2. Olefart

    Olefart Senior Refuge Member

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    We use different sizes of plastic milk jugs with caps sealed with RTV sealent. squeezed as many jugs under seat as needed to fill every nook and granny. We also use the flat style 1 qt. oil bottles under the floor, crushed down and sealed the caps. We use a dab of sealent on floor between the ribs to hold bottles in place. Surprising how much floatation a few jugs will provide and support the flooring.
     
  3. callinfowl

    callinfowl Kalifornia Forum

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    Blue foam insulation board from Home Depot.
    I did a 3 month submersion test on it and I even drilled holes in it and popped a hammer head into the foam and crushed it.
    It came out just as light as it went in, just don't get any fuel on it and it will last forever.
     
    Phytoplankton likes this.
  4. Dogface

    Dogface Senior Refuge Member

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    I know guys who used those flotation "noodles" they sell in Walmart for swimming pools. They are about 4' long but can be cut to size. They are made of close cell foam so they will not absorb water. The best part they are cheap.
     
  5. GUNNERX2

    GUNNERX2 Elite Refuge Member

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    If you have a Tractor Supply close by, they have large blocks of styrofoam that are used on shipments of utility trailers. Free for the asking, at least at the store close to me.
     
  6. Tuleman

    Tuleman Elite Refuge Member

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    I don't think flotation that weighs 1200 pounds will fit in a jon boat sixteen inches long.
    Heck, I doubt it would fit in a jon boat that is sixteen feet long!
     
    Dogface likes this.
  7. HaydenHunter

    HaydenHunter Elite Refuge Member

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    Haha Tuleman. Good catch on the boat length.

    I think he is looking for enough flotation to offset 1200 lbs of boat, motor, occupants and load sinking if swamped.
     
    callinfowl likes this.
  8. Holland

    Holland Refuge Member

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    Haha Tuleman, good catch on the ' vs ".

    Thanks for the suggestions so far--I'll look into those options.
     
  9. tcc

    tcc Elite Refuge Member

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    Use the jugs, not foam. I don't care what type of foam you use it's eventually going to hold water. Closed cell will just take a little longer than open cell.
    Use plastic bottles like olefart said(although I can't figure out why you'd crush them???).
     
    Fowler267 likes this.
  10. callinfowl

    callinfowl Kalifornia Forum

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    Yeah, the foam we put under the floor of our boat is only 10yrs old and it's still not water logged.
    I guess we need to give it a few more years for a real test of time.:l:l:l
     
    RTIC and KID CREOLE like this.

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