I second the glass fiber addition.
As part of our company's R&D we tested epoxy several fillers for resistance to cracking during thermal shock. We ran samples with ground glass fiber, cabosil, and glass micro spheres. The thermal shock profile was -55C (60 minutes), room temp (5 minutes), then +125C (60 minute soak). Repeat 50 times. The ground glass fiber resisted surface cracking best. The cabosil cushioned ferrite core material the best. The micro sphere performance was inconclusive for our application (commercial aerospace components). We are now testing an assembly that has 3 combinations of filler and cure schedule to achieve both surface strength and internal cushioning of the ferrite. We also run moisture and chemical resistance testing of epoxies but there is no organic fibers(wood) involved to show a trend of which epoxy withstand moisture best in a marine application. I typically use West System products. Martin Calypso 1970 C&C 43 Seattle ________________________________ From: CnC-List [cnc-list-boun...@cnc-list.com] on behalf of Dennis C. [capt...@yahoo.com] Sent: Sunday, December 23, 2012 1:36 PM To: cnc-list@cnc-list.com Subject: Re: Stus-List underside of cabin sole Joel, If you can, put some glass fiber on the edges. Epoxy has little strength. The epoxy will split along the edges at the laminations and allow moisture to enter. Put some tape on the top, epoxy on the glass then carefully sand the excess. Dennis C. ________________________________ From: Joel Aronson <joel.aron...@gmail.com> To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> Sent: Sunday, December 23, 2012 8:48 AM Subject: Re: Stus-List underside of cabin sole Pat, It looks like the epoxy is the way to go on the edges and bottom of the plywood. I'll take that 105 off your hands. Let me know when it would be convenient to get together for a beer. Joel Sent from my iPad On Dec 22, 2012, at 5:21 PM, Pat Nevitt <pnev...@gmail.com<mailto:pnev...@gmail.com>> wrote: Joel, Not what I used on the boards, but I have a whole can of West 105 that is yours if you want it. I used just a small amount when I drilled and filled the holes for my new rope clutches. Pat On Sat, Dec 22, 2012 at 5:17 PM, Pat Nevitt <pnev...@gmail.com<mailto:pnev...@gmail.com>> wrote: Joel, I used epoxy on mine. Did you ever look at the underside of the bilge cover on my boat? It's all epoxy. Pat On Sat, Dec 22, 2012 at 5:04 PM, Joel Aronson <joel.aron...@gmail.com<mailto:joel.aron...@gmail.com>> wrote: Well I took up a couple pieces of the cabin sole, and the underside needs to be re-sealed. Some areas look like they have been damp for a while, but they are not delaminated or spongy. Can I use a marine primer or do I need to spend on West System stuff? Joel Sent from my iPad _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com<mailto:CnC-List@cnc-list.com> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com<http://www.cncphotoalbum.com/> CnC-List@cnc-list.com<mailto:CnC-List@cnc-list.com> _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com<http://www.cncphotoalbum.com/> CnC-List@cnc-list.com<mailto:CnC-List@cnc-list.com>
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