The Big Job

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pelagicasd

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Jan 28, 2001
694
On epoxy. Does anyone know about shelf life? WaltFrom: AlbinVega@yahoogroups.comTo: AlbinVega@yahoogroups.comDate: Sun, 13 Dec 2015 19:35:05 -0800Subject: Re: [AlbinVega] The Big Job






I like the idea of epoxy penetrate on the wood surfaces. It is very durable. I even did this on my airplanes wing spars. But on the Vega I decided not to use epoxy and just go with 4 coats of spar varnish inside and out. I figured that epoxy would add quite a lot of additional expense and extra time in curing and sanding.Winter is cold here and things take lots of time to dry or cure. Repair ability and touch up was also a factor. I also came to the conclusion that the original interior wood lasted for 43 years without much anything. So, in my rationality, cheapness or laziness I opted for just varnish. Looks good too. Cheers.......Tim in Soldotna AK
 
G

Gazuum

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Oct 23, 2010
67
Pearson P365K Port Angeles
  On the epoxy subject, I believe there are non blushing epoxies. Try MAS. Gordon
 
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n6ric

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Mar 19, 2010
208
You are right MAS Epoxy doesn't leave a blush and I use it quite a bit, however that is not the case with penetrating epoxies. At least I've not seen any that don't leave a blush.And, you can't sand the blush off. Sanding will drive the blush into the grain. What I do is probably overkill. I wash the wood with hot soapy water and rinse it thoroughly, then wipe dry with clean rags. I then wipe the surface down with acetone. I've never had a problem with paint or varnish not adhering to the surface.It does take a little longer, but I believe the protection is well worth it.Rics/v Blue Max#2692www.ric-maxfield.net
 
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vega1860

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Apr 28, 2000
691
We have already improved the ventilation in Lealea substantially and we will be doing more this go around. Going with recommendations from local boat owners and builders, we will also be adding Insuladd ceramic microspheres and an anti mildew and mold agent to the paint that we will apply to the entire interior surface of the hull after a thorough cleaning.Chuck
 
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tim_klynn

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Feb 12, 2008
337
I've had good luck using MAS, West and Raka epoxies under varnish.I'm currently trying out Raka's UV resistant epoxy, so far no problems.The air is dry here, so blush isn't a major problem.I used Windex and paper towels to wipe down the last set of parts I'm finishing (dropboards and tiller).On something large, like a keel or rudder I use soap and water, as well as a dab of detergent in the wet sanding water.Occasionally, on a new set of nitrile gloves, they leave behind what I assume is mold oil/wax that causes "fisheyes" in the finish, acetone takes it off.I've found that epoxy first coats seem to bond well to the wood, dry faster than the varnish (petit Flagship) and build faster.If it is cool, I'll run a space heater in a enclosed space to warm the parts and epoxy first, then apply epoxy (or varnish) and reduce the heat a bit to let them cure in a slightly cooler environment. Taking a cold part, epoxying it, and then heating it tends to outgas from the wood pores and bubble the epoxy, especially so with porous woods like mahogany. I think that epoxying warm and curing slightly cooler helps draw epoxy into the wood a bit.The only drawback I have found to epoxy is that if it is a very thick layer, it will chip if your crew bangs into it with hard objects like a spinnaker pole. Easy enough to touch up.Tim
 
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groundhogyh

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May 30, 2006
1,075
My experience is that it works way way longer than the date stamped on the container."walt judy brown allore bestvega@... [AlbinVega]" AlbinVega@yahoogroups.com wrote:






On epoxy. Does anyone know about shelf life? WaltFrom: AlbinVega@yahoogroups.comTo: AlbinVega@yahoogroups.comDate: Sun, 13 Dec 2015 19:35:05 -0800Subject: Re: [AlbinVega] The Big Job






I like the idea of epoxy penetrate on the wood surfaces. It is very durable. I even did this on my airplanes wing spars. But on the Vega I decided not to use epoxy and just go with 4 coats of spar varnish inside and out. I figured that epoxy would add quite a lot of additional expense and extra time in curing and sanding.Winter is cold here and things take lots of time to dry or cure. Repair ability and touch up was also a factor. I also came to the conclusion that the original interior wood lasted for 43 years without much anything. So, in my rationality, cheapness or laziness I opted for just varnish. Looks good too. Cheers.......Tim in Soldotna AK
 
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