Reply
 
Thread Tools Display Modes
 
Old 06-27-2016, 08:14 AM   #1
Veteran Member
 
City: Marblehead,Oh
Country: USA
Vessel Name: Castoff
Vessel Model: 77 Heritage West Indian 36
Join Date: Feb 2016
Posts: 52
Teak question

Hello all, I'm getting ready to apply the finish on our exterior teak. I was wondering if anyone has used one part polyurethane as a finish? I suspect most varnishes are relatively the same but poly is a completely different chemistry (I think). Does poly hold up better in anyone's experience?
__________________
Advertisement

tedted is offline   Reply With Quote
Old 06-27-2016, 12:37 PM   #2
Guru
 
Phil Fill's Avatar
 
City: Everett Wa
Country: US
Vessel Name: Eagle
Vessel Model: Roughwater 58 pilot house
Join Date: Oct 2007
Posts: 2,919
I use one part polyurethane and it hold up better than regular marine varnish. Also blends and adhere to varnish and epoxy.
__________________

Phil Fill is offline   Reply With Quote
Old 06-27-2016, 04:30 PM   #3
Guru
 
djmarchand's Avatar
 
City: East Greenwich, RI
Country: USA
Vessel Name: Bella
Vessel Model: Mainship Pilot 34
Join Date: Aug 2012
Posts: 2,883
I will bet that 99% of the varnishes on the market including marine varnishes are polyurethane based. Originally varnishes were natural pine sap resins, oil and a petroleum solvent. All of that has been replaced with polyurethane today.


I also don't think that there is any difference between marine varnishes and the stuff you put on floors or furniture that you buy at Home Depot for half or less than marine varnishes.


A good varnish job requires meticulous preparation, five plus coats with light sanding in between and yearly top sanding and recoating and repairing any film breaks. If you do this religiously you can get 5-10 years before you have to strip to bare wood.


Another type of coating is Cetol and its clones. It is entirely different from varnish and is partially opaque or brown. It partially dissolves the undercoats each time you apply so it has a better ability to repair breaks because it does not leave an edge like hard varnish will. But it is softer and scratches and gouges more easily. The brown color helps it withstand UV. You can usually just keep repairing Cetol for years and sand and top coat when needed.


David
djmarchand is online now   Reply With Quote
Old 06-27-2016, 05:31 PM   #4
Veteran Member
 
City: FT.Pierce, Fl
Country: US
Vessel Name: Tuna Talk
Vessel Model: CC Tournament 30
Join Date: Jul 2015
Posts: 82
I've used the expensive marine varnishes from West Marine and the Helmsman brand poly at Home Depot for a fraction of the price. The less expensive polyurethane holds up nearly as well...and I live in the Bahamas 12 months a year, talk about a test ground!
Jim Cooper is offline   Reply With Quote
Old 06-27-2016, 07:31 PM   #5
Member
 
SD_Pappy's Avatar
 
City: San Diego
Country: USA
Vessel Model: Howard Custom Trawler
Join Date: Dec 2014
Posts: 15
You may know this already, but if you apply 3 coats of west system 105/207 first then 2-3 coats of your favorite spar varnish and you'll end up with a finish so deep that it looks like you have 14 coats
SD_Pappy is offline   Reply With Quote
Old 06-28-2016, 08:14 AM   #6
Veteran Member
 
City: Marblehead,Oh
Country: USA
Vessel Name: Castoff
Vessel Model: 77 Heritage West Indian 36
Join Date: Feb 2016
Posts: 52
Quote:
Originally Posted by SD_Pappy View Post
You may know this already, but if you apply 3 coats of west system 105/207 first then 2-3 coats of your favorite spar varnish and you'll end up with a finish so deep that it looks like you have 14 coats
Hmm... never heard of using epoxy. Is pot life an issue? I'll be working out in the sun.
I read an article on it and it does have some advantages.
tedted is offline   Reply With Quote
Old 06-28-2016, 08:52 AM   #7
Guru
 
TDunn's Avatar
 
City: Maine Coast
Country: USA
Vessel Name: Tortuga
Vessel Model: Nunes Brothers Raised Deck Cruiser
Join Date: Feb 2015
Posts: 672
One pary polyurethane varnishes like Minwax Helmsman don't hold up nearly as well as Epiphanes gloss varnish. Here in Maine Epiphanes is the gold standard. It is used on all the high end yachts.
TDunn is offline   Reply With Quote
Old 06-28-2016, 11:10 AM   #8
Senior Member
 
Capecodder's Avatar
 
City: Cape Cod, MA or Fort Myers, FL
Country: USA
Vessel Name: Osprey
Vessel Model: Her Shine. Newburyport
Join Date: Dec 2013
Posts: 266
I have the best results with Minwax Helmsman spar urethane here in South West Florida. I do spend a hour every six weeks with Maintenance. Quick sand and top coat were needed, Always needs work. I'm often asked when I'll be done varnishing, the correct answer is "Never Done" but I try to keep my Brightwork looking like Grandmas dinning room table. Looking good with some character (blemishes) I do not like the look of Cetaol I'd rather paint it than look at the cloudy brown.
Capecodder is offline   Reply With Quote
Old 06-28-2016, 05:35 PM   #9
Member
 
SD_Pappy's Avatar
 
City: San Diego
Country: USA
Vessel Model: Howard Custom Trawler
Join Date: Dec 2014
Posts: 15
Quote:
Originally Posted by tedted View Post
Hmm... never heard of using epoxy. Is pot life an issue? I'll be working out in the sun.
I read an article on it and it does have some advantages.
PL of a 3.5 oz cup is around 20-25 mins @ 70-75 degrees. One other thing, when you do the final sand on the epoxy if you see any shiny spots that means they're low spot so it may take another thin coat, if you can live with the low spots then lightly hand sand those spot.

OK two other things, I went 3 coats of epoxy and I think I could have got away with 2, so that a judgement call; Also on the varnish I have used both Epifanes and Pittit. With Epif. I used 2 coats wood finish gloss because it builds fast and you don't need to sand between if you 2nd coat within 72 hrs and then the final coat was with Epif clear varnish gloss.

Pettit pretty much the same deal expect you lightly sand your coats, first 2 with Flagship because of the fast build and super UV protection and the top coat with Captain's because of the super gloss.

Hell, I forgot this one too, you can also stain your wood prior to the epoxy
SD_Pappy is offline   Reply With Quote
Old 06-28-2016, 05:58 PM   #10
Member
 
SD_Pappy's Avatar
 
City: San Diego
Country: USA
Vessel Model: Howard Custom Trawler
Join Date: Dec 2014
Posts: 15
Quote:
Originally Posted by Capecodder View Post
I do not like the look of Cetaol I'd rather paint it than look at the cloudy brown.
I not a real fan either, but the problem most people have with cetol is they do the maintenance coats with the color instead of using the gloss only. I have boats ( or had ) that I did with cetol years ago and made a point to the owner to use just the clear for maintenance.

Also, regardless of what your told, if like cetols natural teak color your can do the 3 base coats with that and finish it off with 2-3 topcoats of your favorite clear gloss varnish, you get a way better finish
__________________

SD_Pappy is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 09:12 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012