Formula 27 Filler

Discussion in 'Materials' started by MEJETSKI2000, Sep 14, 2009.

  1. MEJETSKI2000
    Joined: Jul 2009
    Posts: 24
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Maine

    MEJETSKI2000 Junior Member

    Just how strong is this stuff ? Using it to replace some damaged gelcoat and sanding flush with the existing gelcoat before coating everything with new gelcoat. Have some stress cracks on the seats that I want to repair before recoating.
     
  2. marshmat
    Joined: Apr 2005
    Posts: 4,127
    Likes: 149, Points: 63, Legacy Rep: 2043
    Location: Ontario

    marshmat Senior Member

    This stuff?
    http://www.westmarine.com/1/1/14084-formula-27-filler-pint-from-evercoat.html

    Looks like generic brand Bondo to me. Polyester based, fast setting. I haven't used this particular brand, but have tried very similar products from several other suppliers. They're OK on a car, great on anything dry and stationary, but I don't trust them around water. Or vibration, for that matter.

    Stress cracks are hard to cover up. Their presence is often an indication that the fibreglass underneath is too thin / too flexible for the loads it is subject to. You can patch and cover them, but unless the part is made more rigid, they come back....
     
  3. MEJETSKI2000
    Joined: Jul 2009
    Posts: 24
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Maine

    MEJETSKI2000 Junior Member

    I'm reinforcing the radius on the bench thwarts with fiberglass mat where most of the cracks have occured, as well as the flat surfaces where people will step when boarding. Basically using as a "spot putty" more or less I guess.

    Oh, the boat is a 45 y/o Flying Junior, so I guess some wear and tear is par for the course, they built 'em pretty light back then LOL.
     
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