Filling cracks with resin

Discussion in 'Fiberglass and Composite Boat Building' started by IdahoBoats, Jun 19, 2021.

  1. IdahoBoats
    Joined: Jun 2021
    Posts: 3
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    Location: Hailey,ID

    IdahoBoats New Member

    Can you fill small cracks with just marine resin only? these cracks are in plywood, not structural and are more for aesthetics before paint is applied.
     
  2. missinginaction
    Joined: Aug 2007
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    Location: New York

    missinginaction Senior Member

    There are cracks and then there are cracks. Could you maybe post a photo? Plywood that is coated with various resins can "check" which might be what you're talking about. How do you know the cracking is not caused by structural forces? Plywood expands and contracts as does all wood. I've always covered ply with at least a layer of 4 ounce fiberglass cloth in order to eliminate the possibility of cracking or checking.
     
  3. IdahoBoats
    Joined: Jun 2021
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    Location: Hailey,ID

    IdahoBoats New Member

    Thanks for the reply, these are small, no more than 1/8" wide, not in contact with water. I'm not near the boat or I would post a picture.
     
  4. bajansailor
    Joined: Oct 2007
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    Location: Barbados

    bajansailor Marine Surveyor

    Welcome to the Forum IB.

    In the absence of any photos, what type and size is your boat please?
    And whereabouts on the boat are they? How many approximately?
    Are they just localised in one area, or randomly spread about?
    You mention that they are no more than 1/8" wide - but that sounds pretty wide to me really, for a crack.
     
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  5. Mr Efficiency
    Joined: Oct 2010
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    Mr Efficiency Senior Member

    What do you mean by "marine resin" ?
     
  6. ondarvr
    Joined: Dec 2005
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    Location: Monroe WA

    ondarvr Senior Member

    Type of wood, location, cause of the crack, condition of the wood, what you are expecting from the repair, etc, all need to be answered before any recommendation can be made.
     
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  7. kapnD
    Joined: Jan 2003
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    Location: hawaii, usa

    kapnD Senior Member

    A pretty general question, so to answer it, generally, you’d use a thickened resin compound as a crack filler.
     
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