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Forums28
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The J/30 Class Association has partnered with West Marine and is now a member of the West Marine affiliate program. You can support the J/30 Class when you make your West Marine purchases online. The J/30 Class Association receives a percentage of sales from your purchases when you click through from our website. Click the logo above and you will be directed to the West Marine website with a cookie that identifies you as a J/30 affiliate. You can also use any discounts that you may be authorized.
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Re: Keel Repair
[Re: dennejo]
#14614
04/10/13 02:37 PM
04/10/13 02:37 PM
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Joined: May 2007
Posts: 2,669 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
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Past J/30 Class President
Joined: May 2007
Posts: 2,669
Portsmouth, RI
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- Rough up the exposed lead with a wire brush really well.
- Mix up some neat epoxy using the West 105 and the fast hardner.
- use a chip brush and apply the neat epoxy to the exposed lead
- grab a wire brush that you will throw away, then work the neat epoxy into the exposed lead
- let cure, rinse to remove any amine blush, then dry and lightly sand to rough up the epoxy surface so whatever you use will adhere.
This will guarantee that you have a good bond to the lead and won't get flaking or cracks. You can fair with West Systems epoxy and filler, which will be more durable than Vinyl Ester based resins and will not be as subject to water absorption. The softer fillers are easier to sand, but are more susceptible to damage. Barrier coat is a must for longevity. Shoot for 10 mil thickness which for me was 4 coats Interprotect 2000e
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Re: Keel Repair
[Re: dennejo]
#14622
04/12/13 05:08 AM
04/12/13 05:08 AM
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Joined: May 2007
Posts: 2,669 Portsmouth, RI
Rhapsody #348
Past J/30 Class President
|
Past J/30 Class President
Joined: May 2007
Posts: 2,669
Portsmouth, RI
|
Chris, I used 403 Microfibers mixed with 410 Microlight and did not use 407 Microballons. I found that the 406 Colloidal Silica seemed to leave little void bubbles that needed to be sanded and faired. The key is make sure the temperature supports curing - 60 degrees or better. I fought mother nature on the temps the spring I faired the keel and mother nature won. No matter how thick the epoxy was mixed, the mixture still sagged before it cured, requiring more sanding and filling. When I planed the keel, I made sure it was a little narrower than the templates to compensate for filling. This included the joint at the keel stub. I epoxied a tape of glass cloth about 4" wide around the entire joint and sanded smooth before fairing. You may see some good pics in this thread.
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