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Subject: Re: Krystal CV on a exterior table

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Message Thread:

Krystal CV on a exterior table

2/15/15       
K--J

I have a small table to make for a patio out of mahogony...wondering if i use krystal what will happen? Used the eurox before on exterior doors with poor results. Mahogany doors ended out being painted after a year because the became chalky almost white. hoping to use Krystal. I've always wondered why it wouldn't hold up. Considering marine epoxy if krystal is a big no. Thoughts appreciated!

2/15/15       #2: Krystal CV on a exterior table ...
Leo G

It'll fail, quickly. It's to brittle to withstand the wood changes with the humidity.

EM9300 by Target would be a better choice.

2/15/15       #3: Krystal CV on a exterior table ...
K--J

Thank you for the info. That stuff sounds fantastic. I had never heard of it. Can i spray it with a kremlin aaa?

2/15/15       #4: Krystal CV on a exterior table ...
Leo G

I've only used it once and I put it on with an HVLP. It goes on in 2 mil wet coats. So it takes a few coats to get a build. But it doesn't have a dry mil limit. So you could put as many coats on it as you wish.

When it starts to show some wear you can apply another couple of coats after a scuff and put it on with a spray or brush.

I put it on a door about 6 years ago and it's still holding up. It's in a semi protected area but still fully exposed to the weather.

2/15/15       #5: Krystal CV on a exterior table ...
K--J

Excellent thank you. Really appreciate it

2/16/15       #6: Krystal CV on a exterior table ...
David R Sochar Member

I admit ignorance of the newer hi-tech finishes in exterior use.

However, as a manufacturer of exterior doors, I have settled on Sikkens as the preferred finish when 'over time' is concerned. It is not the winner on the first day, but it looks good on down the road, and the big bonus is that it is designed to be recoated easily. And removed in case it ever comes to that. This is what makes it unique. Just as a good boat varnish is not made to last forever, it is made to be removed and replaced by new finish. Sikkens does not normally need to be removed, but it does need periodic recoating.

The problem with all these bullet proof finishes - epoxy being one of them - is that they WILL eventually fail, and when they do, water gets under that film and so the film has to be removed - meaning a chemical and or mechanical stripping.

The history on this is clear - In the mid 90's, a large California/Mexican/Bolivian company that imported doors into the US came up with a great 12 step furniture grade finish for their doors. However, in time the finish would fail. The costs to remove and refinish on site were often as much as new doors, plus the duration and difficulty of working in a home. They are no longer in business.

Admittedly, this is the long view. I have been making exterior doors for 40 years, and Sikkens is the one finish I can recommend for most situations that involve exposure.

A table will most likely need to be recoated every year if it has much exposure. There is a reason that unfinished Teak is the preferred wood for this use. There is a reason why you don't see Mahogany finished furniture outside. It doesn't work.

2/17/15       #7: Krystal CV on a exterior table ...
RobertJ

Plain and simple: The Sikkens of today is garbage. Older product line was superior to most products. Now: Try Epifanes! Or any European Long Oil coating. Buy from a Marine Supply or Jamestown Distributors.

2/17/15       #8: Krystal CV on a exterior table ...
Tim G

I made a sample door some folks wanted in cypress bead board. I sprayed it with Krystal, then later used it to mount a sign my cousin gave me on my driveway gate.I had no illusions as to how long the finish would last as I live in Florida, which has to be about the toughest environment there is. Much to my surprise, it has taken four years to begin breaking down. It gets little sun though as its shaded well by some live oaks.

2/17/15       #9: Krystal CV on a exterior table ...
Paul Snyder  Member

KJ,

I generally use Matthews 2K acrylic polyurethane for the exterior work I do, but it's not an easy finish to maintain.

Practical sailor tested a variety of exterior finishes a few years ago including 1 and 2 component film forming finishes and penetrating finishes. Their results are published in the article at the link below. Take a look at the comments to the article also - one poster has some additional information on improving the performance of Epiphanes and another pointed out they didn't test Alwgrip which has a stellar reputation.

I'm also attaching an article from West Systems epoxy that discusses the benefits of sealing the wood with epoxy to seal it from moisture and then top coating with varnish to slow the damage from UV from the sun.

As David pointed out, all exterior finishes need regular maintenance (sand and re-coat) before they fail. And durable film forming finishes are difficult to replace when they fail.

Click the link below to download the file included with this post.

EpoxyVarnishCombo.pdf

Practical Sailor - exterior finishes

2/17/15       #10: Krystal CV on a exterior table ...
K--J

Really good stuff guys. I've learned alot!

2/18/15       #11: Krystal CV on a exterior table ...
K--J

Forget target coatings they wont respond to my emails. Customer service is high importance and if they cant try to reel in a prospective client then it's pass for me

2/18/15       #12: Krystal CV on a exterior table ...
Leo G

Jeff Weiss is the inventor of the Target line. He has a forum and answers questions there.

http://targetcoatings.com/forum/

2/18/15       #13: Krystal CV on a exterior table ...
jeff Takac

Website: http://www.milesi.us

Hi K-J,

We at Milesi have a 2K solvent base Exterior high performance coating as well as a WB coating designed specifically for this application. Contact me at www.milesi@milesi.us to get the right system for your project.

2/20/15       #15: Krystal CV on a exterior table ...
Jim

Regarding Alwgrip, back in the 80's I worked for a boat company using that product. Boat cost was from 7-25 million dollars. Really no budget or time constraints. 1 year later the finish was falling off.......and it was hundreds of dollars per gallon.....it was beautiful when it was new.....

2/20/15       #16: Krystal CV on a exterior table ...
Jim

Also, we were told (sales pitch) this is the finish used on jet aircraft......

Note: I am talking about exterior bright work (wood trim) not the hull or immersed in the water!

 

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