Carbon Masts
Printed From: Yachts and Yachting Online
Category: Dinghy classes
Forum Name: Dinghy development
Forum Discription: The latest moves in the dinghy market
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=2103
Printed Date: 06 Aug 25 at 4:19am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com
Topic: Carbon Masts
Posted By: ifoxwell
Subject: Carbon Masts
Date Posted: 14 Aug 06 at 7:53am
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Some advice please Whats the best way of re-finishing a carbon mast where the varnish (if thats what it is) is flaking off Ian |
Replies:
Posted By: JimC
Date Posted: 14 Aug 06 at 8:04am
| More varnish? But actually I don't trust varnish to keep the UV off carbon sticks properly. I use international two pot paint by preference and accept the weight. |
Posted By: ifoxwell
Date Posted: 14 Aug 06 at 9:12am
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Thanks Jim. Does it need any special priming or preparation? I have some of the standard 1 part, enamel type of paint in the garage. Does this work. Stuck to the boat it went on amazingly well! |
Posted By: JimC
Date Posted: 14 Aug 06 at 9:25am
yeah one pot will work fine, two pot ought to last longer. All the usual preparation nonsense applies to two pot, also it doesn't sit well on every previously painted/varnished surface and is more finicky in general. I don't know whether 2pot will react with the existing varnish on your stick: I've only ever put it on new masts without varnish. I've just slung it on without undercoat but with a carfeully prepared surface. |
Posted By: stuarthop
Date Posted: 14 Aug 06 at 11:54am
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mine needs re varinshing aswell, its had two pot varnish on it before but i really cant afford the stuff at the moment, will clear laquer you put over car paint do the job?
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Posted By: dics
Date Posted: 14 Aug 06 at 12:26pm
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I use a a spray for car trim. You can get it from Halfords about £5 a can. One can does my mast. Forget the name of the product but it is by Turtlewax and specifies on the back that it has UVA & UVB block in the product (read the label before use!). Easier than vanishing and doesn't crack. Don't know if it's any better or worse than vanish. |
Posted By: Adam@LDC
Date Posted: 14 Aug 06 at 12:28pm
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To re varnish Carbon Masts, you require a two pot varnish. ie International Perfection or SP UltraVar. The reason you require the two pot varnish is that they have the stretch and UV properties required for masts. Some cheaper 1pot varnishes say they have UV protection but will flake off as soon as you put rig tension. Interestingly the New Holmenknol range of polishes and lubes are UV stable, so there Sport Polish can be used on the mast, instead of varnish. ------------- Retail Manager, LDC Racing Sailboats |
Posted By: Jamie600
Date Posted: 14 Aug 06 at 5:24pm
Is it Back To Black?
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Posted By: fizzicist
Date Posted: 14 Aug 06 at 8:49pm
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Thats the stuff - I use it on mine as well - apply it twice per season and it's far less hassle than varnish. ------------- Not all chemicals are bad. Without chemicals such as hydrogen and oxygen, for example, there would be no way to make water, a vital ingredient in beer. |
Posted By: dics
Date Posted: 15 Aug 06 at 9:18am
| No it's not Back to Black. I used to use that but this is a newer one and I think it could be better - I don't think Back to Black has a UVA & UVB protector in it. Also it didn't get my mast from grey to back either as the new stuff I use does. I'll look at a can tonight and get the name - I think I got one at home. |
Posted By: dics
Date Posted: 16 Aug 06 at 11:52am
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Found a tin of the stuff last night. It got the rather cheesy name of "Black in a Flash". It's made by Turtlewax and costs about a fiver. |
Posted By: ifoxwell
Date Posted: 18 Aug 06 at 9:16am
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An update plus another question. I’ve decide to paint the mast in question because. I like the idea of reflecting as much of the heat as possible and complete UV protection. Once rubbed back the finish still wasn’t great and would have looked patchy I had some in the garage Any way next question. What’s do people use as a barrier between the carbon and alli fittings when I put it all back together again? And how about screws and rivets etc. Ian |
Posted By: JimC
Date Posted: 18 Aug 06 at 9:18am
The yucky yellow zinc paste you can get from a chandlers that does bigger boat stuff as well. Use it on everything. |
Posted By: Boatboy
Date Posted: 18 Aug 06 at 9:46am
| the yellow stuff is called duralac and works well, but everything posible should be done to ensure fittings and rivets are not made of Alu Alloy |
Posted By: ifoxwell
Date Posted: 18 Aug 06 at 9:55am
| Thanks guys |
Posted By: ifoxwell
Date Posted: 24 Aug 06 at 7:56am
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Ok quick update incase anyone else is in the same position. I went with the paint option in the end for the reasons stated previously. 1 pack international with its associated primer. two coats of primer brushed on then sanded well back with two coats of top coat applied with a roller, sanded back lightly and then one final top coat. The result is more than acceptable and so far after a couple of days messing about with the rig, and an evenings sailing, its standing up well. Thanks for all the advice Ian |
Posted By: Medway Maniac
Date Posted: 24 Aug 06 at 6:23pm
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And indeed was going well last night, Ian. But I'm surprised the boat didn't fall over with the weight of all that paint up the mast... |
Posted By: BigFatStan
Date Posted: 30 Aug 06 at 3:03pm
| Boys, boys, boys.... don't use duralac - it's horrible. The stuff to use is called Tefgel - works a treat, isn't yellow (it's actually a clear gel) and comes in nice friendly syringes so you only squeeze out the amount you need... you don't get huge quantities but then who ever used a lot of the duralac they paid out for? A lot of pro riggers are using this stuff now... |
Posted By: Guest
Date Posted: 30 Aug 06 at 5:53pm
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Where can you buy it? ------------- |
Posted By: BigFatStan
Date Posted: 31 Aug 06 at 4:24pm
| Nearest to you is Seamark Nunn I think Rick... but it's distributed by Harken |
Posted By: Guest
Date Posted: 09 Nov 06 at 6:57pm
Did you use the wax or the aresole(sp?)? Rick ------------- |
Posted By: Jack Sparrow
Date Posted: 09 Nov 06 at 10:03pm
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neither i want it for may arm pits. sorry couldn't resist the old - not the 9 o'clock news gag. 
------------- http://www.uk3-7class.org/index.html" rel="nofollow - Farr 3.7 Class Website https://www.facebook.com/groups/1092602470772759/" rel="nofollow - Farr 3.7 Building - Facebook Group |
Posted By: mike ellis
Date Posted: 15 Nov 07 at 6:48pm
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my mast on my 600 needs some attention, its currently in the garage. when i rub it down with a cloth lots of hairy little bits of carbon come off. what should i do? will putting some new varnish on it be okay? (i have some twopack varnish from when my dad was using it for something) or does it need more drastic measures? ------------- 600 732, will call it Sticks and Stones when i get round to it. Also International 14, 1318 |
Posted By: JimC
Date Posted: 15 Nov 07 at 8:58pm
| Unless its really peeling I'd just use two pot. I doubt putting more epoxy on would help: it would be a kinda desperate measures option. |
Posted By: timnoyce
Date Posted: 15 Nov 07 at 9:14pm
If bits of carbon are coming off when you rub it with a cloth that sounds like a bit of a problem! Are you sure its not just the laquer rubbing off? I'd take Jims advice and just re-varnish it as then it'll at least look good even if it is proper rogered!  ------------- http://www.facebook.com/bearfootdesign - BEARFOOT DESIGN Cherub 2648 - Comfortably Numb |
Posted By: tmoore
Date Posted: 15 Nov 07 at 9:39pm
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i had that with my rs300 topmast. however the bottom mast was fine. Turns out, 2sails after i bought it the bottom section went. either way, i would throw some varnish in its direction. atleast then if you need to send pics in to the insurance company if it goes then it looks well cared for tom ------------- Landlocked in Africa RS300 - 410 Firefly F517 - Nutshell Micro Magic RC yacht - Eclipse |
Posted By: mike ellis
Date Posted: 16 Nov 07 at 10:10am
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thanks all, varnish it is! ------------- 600 732, will call it Sticks and Stones when i get round to it. Also International 14, 1318 |
Posted By: RodB
Date Posted: 17 Nov 07 at 11:04am
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Why would applying 2 pot coloured paint weigh more than the equivalent volume of 2 pot varnish? Does the varnish absorb the UV or reflect it? and if so shouldn't the paint absorb or reflect it better? Discuss RodB |
Posted By: Isis
Date Posted: 17 Nov 07 at 11:34am
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A decent varnish should protect from UV as well as paint will I think... but there is an argument for using a light coloured (white) paint to reflect heat. Not sure on the weight front but I doubt theres a lot in it.
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Posted By: foaminatthedeck
Date Posted: 17 Nov 07 at 12:17pm
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the change of weight will down the difference in weight of the pigment to the resen/hardner it replaces it think, overall i'd have thought that it would be pritty small.
------------- Lark 2170 |