Hi Dennis- Why would you need such a high strength material on the leading edge of a keel? This seems like a pretty low stress area. I tend to think I should worry more about adhesion strength and the different materials have a large range of surface preparation procedures for adhesion to the lead. I have talked to a few people about keel repair and no one has had problems with the repair failing and the materials have ranged from thickened epoxy with chopped glass to marine tex putty to lightweight epoxy putties (Interlux/pettit). Here is what I have found so far on properties
Marine Tex: tensile strength 4000 psi compression strength 13000 psi West system epoxy resin tensile strength 7000 psi compression strength 11000 psi One other question- is the lead keel normally coated with something before bottom paint? I am having the bottom stripped this winter and not sure if a primer is needed on the keel before bottom paint. Dave On Nov 21, 2015, at 11:03 AM, Dennis C. via CnC-List <cnc-list@cnc-list.com> wrote: > On a leading or trailing edge of a keel you need high strength material. A > lightweight fairing compound won't work. > > I did some minor keel repair on Touche' a few years back. Just squaring off > the trailing edge. I used epoxy thickened with colloidal silica. Microfiber > thickener would have worked just as well. Both will cure to high strength. > > Dennis C. > Touche' 35-1 #83 > Mandeville, LA > _______________________________________________ > > Email address: > CnC-List@cnc-list.com > To change your list preferences, including unsubscribing -- go to the bottom > of page at: > http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com > Aries 1990 C&C 34+ New London, CT
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