Epoxy, Resin or What ?

Discussion in 'Fiberglass and Composite Boat Building' started by MEJETSKI2000, Jul 9, 2009.

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

    MEJETSKI2000 Junior Member

    I have some cracked fiberglass in my bilge where water seeped in and froze after many winters. Can I use a liquid epoxy or something else to seal the cracks before I lay some mat or cloth over it ? The hull is totally dry, water invasion was due to cracked gel-coat which is being re-applied.
     
  2. mark775

    mark775 Guest

    You need to send pics of what you have. The gelcoat cracked because of what happened under it.
     
  3. gonzo
    Joined: Aug 2002
    Posts: 15,770
    Likes: 1,197, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    What did the water seep into?
     
  4. MEJETSKI2000
    Joined: Jul 2009
    Posts: 24
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Maine

    MEJETSKI2000 Junior Member

    It puddled down inside the hull around the centerboard well. When I removed the waterlogged foam in the well I saw a bunch of cracked resin at the bottom. Guess I should remove the outer section so I can see how bad it really is, but it doesn't look very good.
     
  5. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 490, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Grind out each crack, plus the surrounding areas and wet them out with neat epoxy. Apply cloth to the ground out areas to restore the laminate to it's original thickness. Then apply more neat epoxy to the repaired area to seal it up from more moisture invasion. Of course the laminate needs to be very dry for this to work.
     
  6. MEJETSKI2000
    Joined: Jul 2009
    Posts: 24
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Maine

    MEJETSKI2000 Junior Member

    Well, after removing the outer section inspection revealed that water has saturated the roving (black in several spots) so I'm grinding it all out and will rebuild with epoxy. I'm thinking of using fiberglass sheeting to rebuild the inner section, will epoxy bond with it ok ?
     
  7. mydauphin
    Joined: Apr 2007
    Posts: 2,164
    Likes: 53, Points: 48, Legacy Rep: 575
    Location: Florida

    mydauphin Senior Member

    Best dry out area. You can use polyester or epoxy. Epoxy is much better. But if you use epoxy don't mix fiberglass resin in repair, fiberglass won't bond o epoxy.
    Water or even moisture in area will weakened repair. You can dry with time, heaters or sometimes in a hurry use acetone. Or all three.

    Epoxy is then times better than polyester.
     

  8. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 490, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    You need more then epoxy, you need to replace the laminate too. Use cloth only with epoxy, no mat. The black spots may just be mold, so be sure you're removing bad, not just dirty laminate.
     
Loading...
Similar Threads
  1. makobuilders
    Replies:
    11
    Views:
    1,914
  2. grady
    Replies:
    8
    Views:
    11,808
  3. Ebrahim2020
    Replies:
    10
    Views:
    6,523
  4. shamsul hasan
    Replies:
    20
    Views:
    6,092
  5. lobsterman
    Replies:
    5
    Views:
    6,892
  6. hyboats
    Replies:
    4
    Views:
    2,055
  7. 2heets2wind
    Replies:
    99
    Views:
    60,778
  8. 61sg
    Replies:
    20
    Views:
    17,837
  9. ajse
    Replies:
    2
    Views:
    122
  10. Robert Biegler
    Replies:
    6
    Views:
    674
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.