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Fiberglass hull repair: Polyester or Epoxy

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  • Fiberglass hull repair: Polyester or Epoxy

    Hi guys,
    I am currently rebuilding a 1991 Skeeter Bass boat and have reached the point of re-glassing. Right now it is down to the fiberglass hull only and I have noticed several areas on the bottom that were repaired (externally) due to breaks through the hull and I am in the process of grinding the repair off and fixing it from the inside. The areas in question are aprox. 18"x 2" and 10" x 5", as well as a crack about 3 feet long. Yes it is a lot of damage.I am going to gel coat the hull when finished so I need poly to be against the hull/gel coat right? So my plan is to apply 2-3 layers of 1.5 csm to the cracked areas then add a layer of cloth with epoxy resin over the top of it for strength, and finally glass down the stringers with 1708 and poly over the epoxy cloth. My question is will the poly stick on top of the epoxy cloth. Should I even use epoxy? It has been a lot of man hours getting to this point and I never want to have to make this repair again not to mention the bottom of a bass boat takes somewhat of a beating so I need it to be strong. All help will be greatly appreciated.


  • #2
    Re: Fiberglass hull repair: Polyester or Epoxy

    Originally posted by Heliguy78 View Post
    Hi guys,
    I am currently rebuilding a 1991 Skeeter Bass boat and have reached the point of re-glassing. Right now it is down to the fiberglass hull only and I have noticed several areas on the bottom that were repaired (externally) due to breaks through the hull and I am in the process of grinding the repair off and fixing it from the inside. The areas in question are aprox. 18"x 2" and 10" x 5", as well as a crack about 3 feet long. Yes it is a lot of damage.I am going to gel coat the hull when finished so I need poly to be against the hull/gel coat right? So my plan is to apply 2-3 layers of 1.5 csm to the cracked areas then add a layer of cloth with epoxy resin over the top of it for strength, and finally glass down the stringers with 1708 and poly over the epoxy cloth. My question is will the poly stick on top of the epoxy cloth. Should I even use epoxy? It has been a lot of man hours getting to this point and I never want to have to make this repair again not to mention the bottom of a bass boat takes somewhat of a beating so I need it to be strong. All help will be greatly appreciated.
    Nope,.... Yer startin' 'n finishin' with Polyester,.... Epoxy has No place in yer build....
    Any Grease is Better,..... Than No Grease at All.......

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    • #3
      Re: Fiberglass hull repair: Polyester or Epoxy

      Tagging along,.............

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      • #4
        Re: Fiberglass hull repair: Polyester or Epoxy

        Bondo is right. Epoxy is overkill.
        1986 Carlson CVX-18 Restoration

        1995 Sea Ray 220 Signature Deck and Stringer Restoration (SPLASHED!!!)

        1981 Glastron SX-190 Rotten Transom Replacement and Re-power! (Splashed and SOLD)

        Follow !

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        • #5
          Re: Fiberglass hull repair: Polyester or Epoxy

          The big issue is that NO the poly wont stick to the epoxy.
          sigpic1982 Baja 16ss

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          • #6
            Re: Fiberglass hull repair: Polyester or Epoxy

            Epoxy has its place. Not here though. IMHO you should use the same type resin as was used to build the hull originally (polyester). That way you will have the same or nearly the same flex and not have any hard or soft spots created from the different combination of materials. Just be sure you abrade the old hull with coarse grinding to get the best mechanical bond you can. There will be little if any chemical bond between the old hull and new resin.

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            • #7
              Re: Fiberglass hull repair: Polyester or Epoxy

              If vinylester resin is not to much more than poly then I would go with that. Sticks to wood a hell of alot better that poly from my experience/testing. If your having any wood in your boat that is! :>

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