CPES
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Boat Maintenance
Forum Discription: Discuss maintenance of your Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=15444
Printed Date: November-18-2024 at 4:40am
Topic: CPES
Posted By: WakeSlayer
Subject: CPES
Date Posted: September-29-2009 at 2:42pm
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I am starting to get my list together to do the stringers in my 67 Nautique. This time I plan on using CPES to coat all the fir and ply I am installing. I did a couple searches. I found one reference where Greg said he used most of 2 gallons to do the patch.
Sound about right for what I need to do? I assume I want the Smiths Cold CPES formula considering the temps in my shop in the winter. I used West 105/205 last time for the epoxy and it worked very well. I found a guy locally that will sell me gallon kits of West Systems for $90. That will save me a ton of dough. He will also sell me my glass tape and cloth at bulk wholesale prices. My last question is how much will using the CPES reduce the amount of epoxy I need? Last time I coated all the wood with West 2-3 times. I went through a lot on the ply, especially. Will I get away with one coat on top of the CPES coated wood? Mike ------------- Mike N 1968 Mustang |
Replies:
Posted By: 8122pbrainard
Date Posted: September-29-2009 at 2:59pm
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Mike,
With the CPES, figure on 1 less coat of epoxy resin. The 2 gal. sounds correct for the stringers and the ply. It really soaks it in. On the ply edges and lumber ends, you just keep rolling it on, go back in a hour (it's got a long pot life) and apply more!! One good coat on the ply faces will do it. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: WakeSlayer
Date Posted: September-29-2009 at 4:14pm
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Perfect. Thanks Pete, as always!
------------- Mike N 1968 Mustang |
Posted By: behindpropeller
Date Posted: September-30-2009 at 12:11am
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Pete-
I have a few old wood skis here that are partially cracked down the middle. Do you think I can drip the cpes into cracks and fix them? Good idea or bad? Tim ------------- |
Posted By: 8122pbrainard
Date Posted: September-30-2009 at 8:58am
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Tim,
CPES is designed as a sealer primer. It's viscosity is like water and it won't fill any gaps. The fillers used for epoxys could be used to thicken it up but you'd just be defeating the CPES purpose. Depending on the crack width, a epoxy with a filler probably will be needed. It would still be a good idea to get some CPES in the cracks to prime the wood first. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: behindpropeller
Date Posted: October-02-2009 at 12:38pm
Pete there really is not a gap. It is just a split where the wood was previously joined in the center. In the past normal epoxy has not worked (won't seep in the gap). Maybe I will get some and give it a try. Tim ------------- |
8122pbrainard wrote:Posted By: 8122pbrainard
Date Posted: October-02-2009 at 1:50pm
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Tim,
Carefull as the CPES really isn't a adhesive and as stated has no gap filling qualities. Since the epoxy didn't work for you in the past, I'd say it's due to the difficulty in trying to get it down into the crack. I have used wood wedges driven in one end of a crack to open it up and then a epoxy injector (syringe). In some cases, I've even intentionally split a cracked piece all the way to get a adhesive in all the way on the crack. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: form&function
Date Posted: October-05-2009 at 7:45pm
The ski needs to be pressed together when you try to glue it.They make a few different types of glue but I just use resin.Don't know why but I have a soft spot for old skis.
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Posted By: Hollywood
Date Posted: October-05-2009 at 8:46pm
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Damn, that is nice! ------------- |
Posted By: osukellen
Date Posted: October-05-2009 at 8:47pm
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Is that a Maherajah? ------------- Soon to be owner! |
Posted By: form&function
Date Posted: October-05-2009 at 10:03pm
| One of the early cypress gardens dp |
Posted By: WakeSlayer
Date Posted: January-16-2010 at 12:57pm
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Does CPES release from plastic like epoxy does?
Or does it not even stick to it in the first place? ------------- Mike N 1968 Mustang |
Posted By: 8122pbrainard
Date Posted: January-16-2010 at 1:21pm
Mike, Depends on the type of plastic but being epoxy thined down with solvent, once the solvent flashes off it acts the same way. It will pop off things like a plastic poly roller tray, plastic poly mixing cups or out of plastic glue syringe/injectors. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: WakeSlayer
Date Posted: January-16-2010 at 1:26pm
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Cool. I used blister packs, spinach containers and stuff like that to hold up the pieces from the Mustang while epoxying them. I failed to heed the CPES suggestion on that project, and just epoxied the heck out of the wood.
I should be CPES'ing stringers late next weekend !! ------------- Mike N 1968 Mustang |
Posted By: Waldo
Date Posted: January-16-2010 at 1:30pm
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Slayer you need to get your camera fixed.
Waldo |
Posted By: abolton
Date Posted: January-20-2010 at 7:23pm
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3 Questions
Does Home Depot or Lowes carrie CPES ? Will Polyester Resin stick to the wood if its coated with CPES ? What makes CPES better than other wood sealers that Home Depot carries like Thompson's ? ------------- ABE |
Posted By: SNobsessed
Date Posted: January-20-2010 at 9:48pm
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Abe - I'll give this a shot - CPES is a specialty item not used by the general public so I doubt a retail big box store will carry it.
Polyester will not stick to epoxy well - stay with epoxy resin for the entire project. If you really want to use polyester, start with that. CPES is an epoxy plastic that permanently hardens. Preservatives like Thompsons are basically an oil based preservative that dries up eventually. Neither epoxy or polyester will stick to a Thompson-soaked peice of wood. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: 8122pbrainard
Date Posted: January-20-2010 at 9:56pm
Chris, Well said. Abe, I'd only like to add that CPES is really epoxy that has been reduced (thinned) with solvents to a very low viscosity. This allows it to deeply penetrate the wood. BTW, you've been watching too many Thompsons Water Seal ads on TV!! The stuff is nothing but crap!! Take a look at Consumers Reports on the actual testing they did. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |