5 Gallon Pressure Pot ??

Discussion in 'Fiberglass and Composite Boat Building' started by trekker, Apr 18, 2019.

  1. trekker
    Joined: Jan 2016
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    trekker Junior Member

    Can anyone suggest a good set up for spraying gelcoat into a skiff mold that doesn't cost several thousand dollars?

    Ive seen the 5 gallon pots but have no experience with them.

    Relatively new to boat construction and want to avoid dropping serious cash right off the bat on gelcoat application.

    Thanks !!
     
  2. waikikin
    Joined: Jan 2006
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    waikikin Senior Member

    This is cheap and as reliable as the operator & mixer... I use and recommend there's plenty better but at greater cost, is a little wasteful but fine on low volume. Jeff.
     
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  3. KD8NPB
    Joined: Mar 2018
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    Location: South Carolina

    KD8NPB Junior Member

    How will you handle catalyst?
     
  4. ondarvr
    Joined: Dec 2005
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    ondarvr Senior Member

    A five gallon pressure pot would be in the dumpster about 10 minutes into the project.
     
  5. KD8NPB
    Joined: Mar 2018
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    KD8NPB Junior Member

    There’s ways around that, but they’re sketchy. One of the ways I was told was to ice bath the pot.

    If I were to use a dirt cheap system, I would use a cheap diaphragm pump to push material from a pail or drum to a Binks 2100 GW. They’re almost impossible to accurately meter properly, but the total cost would be less than $1500. The “Happybuy QBK15” on Amazon has a polypropylene diaphragm and is styrene compatible.

    Short of that, if I had to hot pot large quantities, maybe a hopper style spraygun for popcorn ceilings? They are designed for viscous material and can be purchased cheaply from harbor freight.
     
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  6. ondarvr
    Joined: Dec 2005
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    ondarvr Senior Member

    Icing the gel coat makes it far more difficult to spray, plus slows down the spray process significantly.

    The only 5 gallon at a time method that works well is to use a commercial house paint airless system. Then use an inhibitor to lengthen the gel time. There is also a product called Gel X (Gel Time Extender), it will about double the GT.

    I used to do this frequently on field jobs where large amounts of gel coat were needed.
     
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  7. fallguy
    Joined: Dec 2016
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    fallguy Senior Member

    Take the advice of ondarvr.

    Ask him for a cheap idea...
     

  8. redreuben
    Joined: Jan 2009
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    Location: Beaconsfield Western Australia

    redreuben redreuben

    5 gallon no, 5 litres is plenty, you can run at least 2 mixes through it and that should suffice.
     
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