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Thread: anyone do fiberglass repair ? need advise on a patch

  1. #1
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    Default anyone do fiberglass repair ? need advise on a patch

    I have this bad rub on the bottom of my boat that I just noticed. I would like to know if this is something that I will HAVE to fix before I go out on the water, or if I can leave it alone for a little while.
    I have been so consumed with work lately I haven't had time to take it in. I will be getting it fixed but I want to put the boat in the water in the next week and take some buddies out fishing.. but don't want to go out if these are bad issues that I should not be on the water with. It doesn't seem cracked all the way or anything, but could this soak up any water, waterlogging the boat at all ?
    Don't laugh, its my first fiberglass boat.

    under.JPG

  2. #2
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    Sand it Mix fiberglass resin chop some mat and mix in resin making a thick paste then pack into holes. Let cure, sand smooth . Then gelcoat. And add a keel guard .

  3. #3
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    Quote Originally Posted by camotoon60 View Post
    Sand it Mix fiberglass resin chop some mat and mix in resin making a thick paste then pack into holes. Let cure, sand smooth . Then gelcoat. And add a keel guard .

    This will work, I would try to do it before you put it back in. I’m against the keel guard though.
    Might as well fair out a lot of the scratches while you are sanding down there.

  4. #4
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    Quote Originally Posted by camotoon60 View Post
    Sand it Mix fiberglass resin chop some mat and mix in resin making a thick paste then pack into holes. Let cure, sand smooth . Then gelcoat. And add a keel guard .
    x2 it wouldn't take long to patch up that little spot and it would give you peace of mind

  5. #5
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    I am going to take it in, I found a guy who was recommended and does good work. And i have a few other little spots to clean up.

    I just need to know if I can go out on the water with that, or if I need to take care of it before.
    Last edited by duckz; 02-27-2019 at 03:44 PM.

  6. #6
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    The darker spot towards the center of the worn section looks like it could be wood to me, or maybe a void which has collected dirt. Poke it with a screw driver and find out what it is.

    Grind till you get to solid glass then (if it were me) get some 4" fiberglass tape (~8oz) and cut it length wise so you have 2" strips and then layer those until you get your thickness back. Then shape everything back to the original and probably wrap the whole thing in another layer and fair that in. Could use layers of 1208 or 1708 if you want to build up quicker.

    Edit- its going to be a real pain getting all that to stick upside down
    Last edited by BET; 02-27-2019 at 04:06 PM.

  7. #7
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    duckz where are you located i know some guys near beaufort/ Hilton Head area

  8. #8
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    That hole will get water in the hull park on a steep hill and see if it drains any water.
    "I'm just a victim of a circumstance"

  9. #9
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    Quote Originally Posted by camotoon60 View Post
    Sand it Mix fiberglass resin chop some mat and mix in resin making a thick paste then pack into holes. Let cure, sand smooth . Then gelcoat. And add a keel guard .
    This! Also lay one more layer of chopped mat over the paste. Then take some wax paper and tape it tight to hold it all on while it cures. Sand it, and I recommend going ahead and putting bottom paint on.
    867-5309

  10. #10
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    Take care of this first. Try to keep that away from as much moisture as possible. you can order a bondo fiberglass repair kit on amazon for 30 bucks, has everything you need to do the job.

  11. #11
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    Quote Originally Posted by SpottailSpecialist View Post
    Take care of this first. Try to keep that away from as much moisture as possible. you can order a bondo fiberglass repair kit on amazon for 30 bucks, has everything you need to do the job.

    Thank you! I’ll grt on it now..
    What’s better to use since I’ll be doing this upside down.. and could drip, the resin or the jelly?
    Last edited by duckz; 03-01-2019 at 07:03 PM.

  12. #12
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    Quote Originally Posted by camotoon60 View Post
    Sand it Mix fiberglass resin chop some mat and mix in resin making a thick paste then pack into holes. Let cure, sand smooth . Then gelcoat. And add a keel guard .

    To be clear, do I gel coat and Paint ? Or can I just use a ‘ “bottom pain” right over the resin? I’m not worried about color matching but I do want it protected.
    Last edited by duckz; 03-09-2019 at 03:00 PM.

  13. #13
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    Will this work? Just use this and I’m done? Or do I have to do anything on top?

    https://www.walmart.com/ip/Evercoat-...SABEgJKX_D_BwE

  14. #14
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    Sorry man I haven’t looked in this forum lately. 699FD469-5D0E-4046-8E1D-99C2D9C7FEBE.jpeg

    You can buy this at advance or at Walmart, but get this and what you do is go ahead and cut you some pieces of cloth that will fit down inside the hole the make them bigger and bigger until they can cover the hole completely. Then sand down your area and around it with 250 grit sand paper, mix up your resin per instructions, put on a coat of resin, lay cloth, put coat of resin lay cloth, do this until you fill the hole and cover it with atleast 2 inches each direction of the bad spot. After it dries and cures sand it smooth and spray some primer on it. This may not be the professional way of doing it but it’s worked for me in the past with good results.

  15. #15
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    Ducks, not sure where you are located, but I have some leftover 1708 cloth and g flex epoxy resin that you may be able to use if you are still doing this yourself. I am in Columbia. The bondo stuff is usually polyester which is a step down from the true epoxies, but either may be appropriate depending on the type of boat. Could the trailer be causing the gouges or is it oyster beds? Definitely needs some work soon or other issues could arise.

  16. #16
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    I'm in Greenville and have extras of everything as well

  17. #17
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    Using an epoxy over a vinyl or poly will set yourself up for a future repair.

  18. #18
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    What's the reasoning behind that?

  19. #19
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    My mistake, I was thinking the wrong way around.


    Sent from my iPad using Tapatalk Pro

  20. #20
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    Thanks y’all. I appreciate the offers on the materials. I’m a little too far East of y’all though. The scuff was there before but it’s nt the trailer. I’m assuming oyster bed or log in the water maybe.

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