Repair & maintenance: RS800 Mast Varnishing

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RS800 Mast Varnishing

Printed From: Yachts and Yachting Online
Category: General
Forum Name: Repair & maintenance
Forum Discription: Questions & tips on the subject
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13013
Printed Date: 25 Jun 25 at 4:10pm
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Topic: RS800 Mast Varnishing

Posted By: Simon1135
Subject: RS800 Mast Varnishing
Date Posted: 11 Mar 18 at 3:35pm

Hello there,

I am just about to re-varnish my RS800 mast. Is it sensible to drill out and remove all the mast fittings before re-varnishing or should I mask off as best I can?

I am a little concerned about reinstating the shroud connection plates and spreader fixings as the load on the spar in these locations is high.

Any assistance would be very much appreciated.

Regards,

Simon

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Replies:

Posted By: JimC
Date Posted: 11 Mar 18 at 4:13pm

I wouldn't touch the fittings. You can do terminal things to carbon masts with rivets if you don't have the right equipment.

Posted By: Simon1135
Date Posted: 11 Mar 18 at 6:22pm

Thanks for your help,

Simon

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Posted By: Do Different
Date Posted: 11 Mar 18 at 6:31pm

A timely topic Simon.

I have a Contender also in need of attention, any advice on the choices of product please?

Posted By: cad99uk
Date Posted: 11 Mar 18 at 6:39pm

I have used Perfection Plus two part on my RS800 mast. As advised by RS.

Have done it twice. Lasts at least five years each time.

No need to remove fittings!

Posted By: Simon1135
Date Posted: 11 Mar 18 at 7:53pm

Thanks for the advice!
I was planning to use Blakes Duragloss which is a single pack varnish. I know this won't give the best finish or last as long as a two pack equivalent, however, the boat is a recent purchase and needs this sorting before I can get out on the water. I'll see how it lasts this season and might change to a more permanent solution at the end of winter 2019.

Any issues with this approach?

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Posted By: Paramedic
Date Posted: 11 Mar 18 at 7:56pm

Any two pack topcoat will be fine. be wary that there are an increasing number of two pack rapid build clear primers - these don't have UV filters and are no use in this application

Posted By: cad99uk
Date Posted: 11 Mar 18 at 8:14pm

Takes no longer to use a two part. Otherwise you will be putting the two part over a one part at the end of the season. So the adhesion will only be as good as the one part that is left on after preparation.

Just use two part from the get go is my 2p.

Posted By: Sam.Spoons
Date Posted: 11 Mar 18 at 8:16pm

Yup, this ^

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Posted By: Paramedic
Date Posted: 12 Mar 18 at 7:52am

Dont use one pack. The UV filters are much poorer and you have to do it again in 12 months

Posted By: Do Different
Date Posted: 12 Mar 18 at 9:14am

What is the minimum temperature you need to sensibly use two pack please?

Posted By: Simon1135
Date Posted: 12 Mar 18 at 8:49pm

My thinking was I'd remove all the single pack before applying a two pack varnish next season as, you are right, I'd be relying on the single pack adhesion.

Good advice though and lots of sanding with my suggested method. I'll put myself an order in for the perfection plus.

Main concern was the mast fittings but I will be leaving them where they are!

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Posted By: Simon1135
Date Posted: 18 Mar 18 at 5:46pm

Originally posted by cad99uk

I have used Perfection Plus two part on my RS800 mast. As advised by RS.

Have done it twice. Lasts at least five years each time.

No need to remove fittings!

Do you know how many coats you usually apply using the perfection plus system? Is 1 750ml tin usually sufficient?

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Posted By: Neal_g
Date Posted: 18 Mar 18 at 6:07pm

from memory a 750ml tin will cover 9 m2 so easily enough for 3 coats on the mast

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Posted By: cad99uk
Date Posted: 18 Mar 18 at 6:50pm

750 ml is plenty. Clean and prepare mast. Apply one coat. Then if you apply second coat within the overcoating time there is no need to prepare between coats. Two coats is sufficient.

There will be enough left over for at least two more coats. So store carefully.

Posted By: Simon1135
Date Posted: 18 Mar 18 at 7:38pm

Many thanks for your help!

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