How to fiberglass top cap back on the hull.
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How to fiberglass top cap back on the hull.

  1. #1
    Member Turbo Dan-O's Avatar
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    Default How to fiberglass top cap back on the hull.

    Hey guys! Finally getting back to work on my hacked up '70 Sanger runner bottom V-Drive project and could use some advice on how I should go about glassing the top cap back on the hull and what supplies I should use. I really want to make this boat slick and I don't want any cracks to show up after paint. Everything is ground and ready. I have West System 105, 206 and 50 yards of 9 ounce 2" glass tape(too narrow?). My plan was to go around the whole boat at least twice starting at the front and working back. So, am I on the right track?

    Here is what we are working with...

    Last edited by Turbo Dan-O; 10-19-2014 at 02:16 PM.
    Sanger V-Drive turbo/carb LSX project...

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    I don't quite get what you are asking. Has the deck been removed from hull and you are putting it back on? Has the hull and deck already been bonded together on the inside and you are asking about capping the boat? They are two different operations. I don't know why anyone would use epoxy unless the hull is epoxy You also might post better pictures of what you are doing will help us to understand. I have sent you a pm.

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    Senior Member OFFSHORE GINGER's Avatar
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    From what i gather , and yes i could be wrong but ............are you thinking of capping the outside perimeter of the hull where the rub-rail once was and not to mention that using epoxy would be a very wise choice considering you can have a controlled pot life depending on the hardner , fast ,slow , etc , which means a longer work time with less waste , and no stank .

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    Senior Member Wheeler's Avatar
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    Rattle Can Lou started a thread that might be of use to you.

    22 Schiada cap job...


    "I have capped several boats in the past and have had good luck with the vinylester resin, it has a better secondary bond. What ever you do do not use epoxy resin if your going to cap it in gel coat, the gel coat will not bond to the epoxy resin. I have used the cloth material and I have also used x-mat. You will also want to make sure you prefill the small gap between the deck and bottom before you start applying the glass, no voids behind the glass at all. I use 3m vinylester premium filler and then sand smooth, another issue can be that when the manufacture originally glassed the inside deck/hull joint they did not put enough glass and there could be a few areas that could use some more. Good luck with it and if you have any questions feel free to give me a call. "
    Last edited by Wheeler; 10-20-2014 at 05:38 PM.

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    The epoxy is also much thinner and cure time makes it a lot harder to perform the thicker build coats needed to cover the cloth. It's a lot more expensive and really not needed. The vinylester works great apply enough coats so as not to sand thru cloth any more than necessary I add wax (surfacing agent) to the last coat makes sanding a breeze. After shaping I will then apply a last coat with wax again finish sand followed by a high build pollyester primer.

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    Senior Member OFFSHORE GINGER's Avatar
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    LOL , Ha Ha Ha for you folks out there who do not like using Epoxy i have done more then my fair share of Capping boats with sizes rangeing from 18 to 46 foot on Skaters , Fountains , Cigs , Platinum , Mags , Donzi's , etc etc . using Epoxy considering i started using Epoxy in my early 20's , and still using it today at the age of 62 . Doubleeagle , 90 % of the Epoxy ( out there ) is as thick as any Polyester / Vinyl , unless of coarse you are using an infusion resin which which will always be thinner to begin with , and if a product or resin does not have the particular consistency you desire it can always be thickened with a filler such as Cab o sil , or .

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    Turbo, I assume you are going to bond the cap to the hull from the inside, right? Take OG's advise and use epoxy. It is user friendly with a longer pot life. Maybe mix up some cabosil or something along that line to make a nice fillet and then start glassing. Tha's what OG told me to do.

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    Senior Member OFFSHORE GINGER's Avatar
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    Dobber , whats ...................................up ,and how is your project coming along ?

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    Quote Originally Posted by OFFSHORE GINGER View Post
    Dobber , whats ...................................up ,and how is your project coming along ?
    Hey OG. My project is going sloooow. I was hoping to get it covered in duratech this fall, I'll have to wait till spring.

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    Member Turbo Dan-O's Avatar
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    Thanks for the replys guys! Yes, the top cap has been completely removed(cut) so we could replace all of the wood in the boat. Now I'm ready to bond it back on and want to make sure it's done right. Think I'm going to get some 4" wide "tape" on the way instead of using the 2".

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    Member Turbo Dan-O's Avatar
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    And yes, glassing it from the inside and epoxy the gap on the outside. That's my plan anyways!

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    Quote Originally Posted by OFFSHORE GINGER View Post
    LOL , Ha Ha Ha for you folks out there who do not like using Epoxy i have done more then my fair share of Capping boats with sizes rangeing from 18 to 46 foot on Skaters , Fountains , Cigs , Platinum , Mags , Donzi's , etc etc . using Epoxy considering i started using Epoxy in my early 20's , and still using it today at the age of 62 . Doubleeagle , 90 % of the Epoxy ( out there ) is as thick as any Polyester / Vinyl , unless of coarse you are using an infusion resin which which will always be thinner to begin with , and if a product or resin does not have the particular consistency you desire it can always be thickened with a filler such as Cab o sil , or .
    Well I capped my first boat in 1968 and was shown how to do it by Bunkie Mierhead while he was at Roberts Marine. I then went to work for Kenney Myers at B&k Boat Repair where we did all the caps for Roger Wieman Rogers Boats, Bob Brown at CB Advenger, I then went to work at Anthony Boats and then even went to work for my dad who was Jerry Wriedts partner Wriedt Boats. and of course Double Eagle. I would guess I may have capped well over 100 low profile flats and Jets ranging from 16' to 24'. Although my Resume is not as impressive as yours I have done my fair share and have tried many different methods and materials.I was just relaying on my memory of how it went. The Epoxy was a pain in the ass as I remember it. I spent more time trying to keep the resin on the cap than I did applying it. My point was the boat was built with polyaster it was bonded with polyeaster why would you choose Epoxy for the cap and good luck if you are planning on using Gel on the cap. So to conclude, to Turbo Dan-O or anybody else who read my reply to this post please disregard what ever advice I have offered. This is apparently well above my pay grade and from now on I will reframe from offering any more advice and being a mere youngster of 61 I defer to my elder. Just a heads up I have used Epoxy on many different projects including wood decks carbon fiber special boats built with epoxys and have no problem working with it. It's just my opion that has it's place.

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    Quote Originally Posted by doubleeagle View Post
    Well I capped my first boat in 1968 and was shown how to do it by Bunkie Mierhead while he was at Roberts Marine. I then went to work for Kenney Myers at B&k Boat Repair where we did all the caps for Roger Wieman Rogers Boats, Bob Brown at CB Advenger, I then went to work at Anthony Boats and then even went to work for my dad who was Jerry Wriedts partner Wriedt Boats. and of course Double Eagle. I would guess I may have capped well over 100 low profile flats and Jets ranging from 16' to 24'. Although my Resume is not as impressive as yours I have done my fair share and have tried many different methods and materials.I was just relaying on my memory of how it went. The Epoxy was a pain in the ass as I remember it. I spent more time trying to keep the resin on the cap than I did applying it. My point was the boat was built with polyaster it was bonded with polyeaster why would you choose Epoxy for the cap and good luck if you are planning on using Gel on the cap. So to conclude, to Turbo Dan-O or anybody else who read my reply to this post please disregard what ever advice I have offered. This is apparently well above my pay grade and from now on I will reframe from offering any more advice and being a mere youngster of 61 I defer to my elder. Just a heads up I have used Epoxy on many different projects including wood decks carbon fiber special boats built with epoxys and have no problem working with it. It's just my opion that has it's place.
    Hey dont get all butt hurt cmon




    I'd rather do mine with vinylester as you said
    Last edited by mdsheppie; 10-23-2014 at 05:08 PM.

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    I have never capped a boat. I did a drop keel on my last Daytona with poly resin. In my openion, poly resin SUCKS! That crap STINKS!!! And kicks unexpectly, like when lm stiring it in the bucket
    Im laying more glass than l would like to admit on my new project. This go round its epoxy, epoxy, epoxy! No smell, predictable cure time, and if you need it thick add cadosil, as stated, so it wont sag or drip.
    For the OP, l might sugest 3" tape. Off set it over the seam, 1 inch above, 2 inches below. Then on the second application 2" above seam one inch below. For the third application straight down the middle. You will have a nice strong layer and a nice taper of 3,2,1. Might be over kill, but thats what l would do (l had a seam split at wfo, lucky no one was killed). Or with what ever size you choose?
    Epoxy sticks to everything, it will not work with a poly top coat on the out side of the hull. Epoxy will if you are going to paint.
    Poly does not stick to epoxy, that is what is being said above.
    Keep us posted, good luck.
    Be safe, schick
    Last edited by schick; 10-22-2014 at 06:55 PM.
    Half the people in the world are below average.

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