Author Topic: Tips for finishing plywood edges  (Read 8026 times)

Offline cgrfish

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Tips for finishing plywood edges
« on: December 01, 2013, 01:37:57 PM »
I'd appreciate some suggestions / tips on how to finish edges of plywood that are left exposed.   For example, the edge on the cut out for the cabin or cuddy cabin door, or the top edge on the transom.   My thought is they are rounded, and coated with repeated layers of epoxy to waterproof them, but I keep wondering if there is a better way.     In particular on the transom I've wondered about how to wrap it in glass to get a stronger more durable edge, but I haven't come up with a good idea on how to do it. 

Any tips would be appreciated.

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Online tananaBrian

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Re: Tips for finishing plywood edges
« Reply #1 on: December 01, 2013, 02:56:22 PM »
What I do:

- Sand to desired shape (never leave sharp edges)
- Blow with compressed air or vacuum out edge of ply (dust-free is best)
- Apply one good coat of epoxy and let it cure
- Sand to smooth, vacuum or blow with compressed air again
- Mix up some epoxy thickened with silica (Cab-o-Sil etc) and using a gloved hand, smear the thickened epoxy into/onto the edge of the wood.  Make sure all holes are filled and that you leave it relatively smooth (close to a finished smoothness).  Let cure.
- Sand edge of plywood to smooth out any goofs with the silica-thickened epoxy, vacuum/blow/wipe to clean it.
- Apply final (1 coat typical) coat of epoxy.

I find that sealing the ply with a coat of unthickened epoxy, followed by filling with silica-thickened epoxy, then finished with a final coat of epoxy is the fastest route to getting the job done and results in a plywood edge that is very waterproof, smooth, and used minimum epoxy and supplies to do it.


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Offline jerry bark

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Re: Tips for finishing plywood edges
« Reply #2 on: December 01, 2013, 03:07:13 PM »
If I wanted to glass an edge I would cut some tape on the "bias."  that is with the two directions of the weave running at 45 degrees to the length of the tape. Then the tape will conform much more easily to the tight curve.

I simply gave my edges a couple coats  of epoxy, one straight and one lightly thickened.

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Offline tolman_paul

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Re: Tips for finishing plywood edges
« Reply #3 on: January 09, 2014, 09:34:24 AM »
Definately glass edges as they will get hit with various items over the years and if you just have epoxied the edge it will become a location for water to ingress. 

Offline SmokinFletch

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Re: Tips for finishing plywood edges
« Reply #4 on: April 11, 2014, 06:33:44 AM »
I put some 4 oz down on the plywood edges, like inside of windows and other exposed places, I would try 2oz matt next build.