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Urethaning wood entry door darkens color

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Urethaning wood entry door darkens color Mikepier 05-15-2008
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Posted by Phisherman on May 15, 2008, 2:29 pm
On Thu, 15 May 2008 06:36:56 -0700 (PDT), Mikepier

>Yesterday as a test, I wiped on a small section of Helmsman Spar
>urethane on my front entry door to see how it looks. This door has
>been recently stripped down to bare wood and I believe its mahogony.
>When it dried, it darkened the color of the wood pretty significantly.
>Is this normal? I thought urethane was suppose to be clear for the
>most part

Usually a finish will darken the wood. To get an idea, wipe a scrap
piece with mineral spirits and you will see the wood darkens. You
could use water, but water will swell the wood and raise the grain.

Posted by Mikepier on May 15, 2008, 3:22 pm
I need to use exterior uethane, plus the door faces west so the sun
beats on it all day. If it's normal for the wood to darken I'm ok with
it, as long as its protected.

Posted by dadiOH on May 15, 2008, 3:54 pm
Mikepier wrote:
> I need to use exterior uethane, plus the door faces west so the sun
> beats on it all day. If it's normal for the wood to darken I'm ok with
> it, as long as its protected.

Don't get the idea it is protected forever. Any finish needs periodic
re-doing and my best suggestion is that you do it *before* it really needs
it...light sanding, one coat.

--

dadiOH
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Posted by O on May 15, 2008, 7:06 pm
If it faces the west sun I'd think long and hard about ANY urethane product.
I have a solid oak door that I had used the "Super Duper 7-Way Protectant,
UV Resistant, Moisture Resistant, etc. etc. etc." After a few years of
relentless sun exposure, the finish was peeling, curling, and just downright
giving up the fight to protect the wood. I spent an entire day with a
Dremel tool sanding all the nooks and crannies to get the last vestiges of
the old urethane finish off.

A good friend that spends a lot of time on wood covered boats told me about
Deks Olje - an oil finish that dries hard and never needs to be removed -
just apply another coat or two every few years. I applied it to the bare
wood 10 years ago and with a couple of reapplications along the way, the
door looks as good as new. There is a satin finish and a gloss finish
available. Easiest finish material I've ever used. Since it is oil, there
are no brush strokes or runs to worry about. The wood drinks it up like
water, creating a much better bond and barrier. After it dries (a day or
two) it is easily washable with water.

Urethane has its place, but heavy exposure to the sun and elements is not
its strong suit.

Just my .02 worth.....

Jay


>I need to use exterior uethane, plus the door faces west so the sun
> beats on it all day. If it's normal for the wood to darken I'm ok with
> it, as long as its protected.



Posted by JoeSpareBedroom on May 15, 2008, 9:12 pm
I agree with the oil paint idea. But, I took a tip from the guy at the
hardware store, who's as obsessive about things as I am. I cut a piece of
3/4" ply the size of the door. Removed the door and screwed the plywood to
the jamb in its place. Put the door on sawhorses so I could paint it laying
flat, doing all the work at eye level. Gave it a full week for the paint to
cure, since the time estimates on paint cans are always silly. The finish
came out looking like a piano and lasted almost 10 years without any visible
wear & tear. I'm sure it helped that it was great paint: Devoe high gloss
oil enamel.


> If it faces the west sun I'd think long and hard about ANY urethane
> product. I have a solid oak door that I had used the "Super Duper 7-Way
> Protectant, UV Resistant, Moisture Resistant, etc. etc. etc." After a few
> years of relentless sun exposure, the finish was peeling, curling, and
> just downright giving up the fight to protect the wood. I spent an entire
> day with a Dremel tool sanding all the nooks and crannies to get the last
> vestiges of the old urethane finish off.
>
> A good friend that spends a lot of time on wood covered boats told me
> about Deks Olje - an oil finish that dries hard and never needs to be
> removed - just apply another coat or two every few years. I applied it to
> the bare wood 10 years ago and with a couple of reapplications along the
> way, the door looks as good as new. There is a satin finish and a gloss
> finish available. Easiest finish material I've ever used. Since it is
> oil, there are no brush strokes or runs to worry about. The wood drinks
> it up like water, creating a much better bond and barrier. After it dries
> (a day or two) it is easily washable with water.
>
> Urethane has its place, but heavy exposure to the sun and elements is not
> its strong suit.
>
> Just my .02 worth.....
>
> Jay
>
>
>>I need to use exterior uethane, plus the door faces west so the sun
>> beats on it all day. If it's normal for the wood to darken I'm ok with
>> it, as long as its protected.
>
>



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