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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 Mike on May 15, 2008, 2:17 pm

>
>> ...
>>> 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.
>>
>> Water is also clear and darkens wood, but it evaporates. Unlike
>> water, urethane sticks around, which is a characteristic you paid
>> for. The result you got is normal.
>
> Sneaky trick:
> Wipe bare wood with mineral spirits. The wood will darken to approximate
> the look you'll have after applying a non-staining finish like
> polyurethane. The mineral spirits will evaporate off in a hour or so.
>
> I've yet to find a finish that's truly colorless.
> --
> Steve B.
> New Life Home Improvement

A water based urethane like, Diamond Varathane Will not darken the wood
like a oil base. I installed a hardwood floor and used Diamond on it. I
like the look.



AppliancePartsPros.com, Inc.
Posted by ransley on May 15, 2008, 2:14 pm
>
>
>
>
>
>
>
> >> ...
> >>> 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.
>
> >> Water is also clear and darkens wood, but it evaporates. Unlike
> >> water, urethane sticks around, which is a characteristic you paid
> >> for. The result you got is normal.
>
> > Sneaky trick:
> > Wipe bare wood with mineral spirits. The wood will darken to approximate=

> > the look you'll have after applying a non-staining finish like
> > polyurethane. The mineral spirits will evaporate off in a hour or so.
>
> > I've yet to find a finish that's truly colorless.
> > --
> > Steve B.
> > New Life Home Improvement
>
> A water based urethane like, =A0Diamond =A0Varathane =A0Will not darken th=
e wood
> like a oil base. =A0 I installed a hardwood floor and =A0used Diamond on i=
t. =A0I
> like the look.- Hide quoted text -
>
> - Show quoted text -

But he need exterior products, the UV protectors usualy give marine
products an amber color.

Posted by Mike on May 21, 2008, 1:14 am

>
>
>
>
>
>
>
> >> ...
> >>> 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.
>
> >> Water is also clear and darkens wood, but it evaporates. Unlike
> >> water, urethane sticks around, which is a characteristic you paid
> >> for. The result you got is normal.
>
> > Sneaky trick:
> > Wipe bare wood with mineral spirits. The wood will darken to approximate
> > the look you'll have after applying a non-staining finish like
> > polyurethane. The mineral spirits will evaporate off in a hour or so.
>
> > I've yet to find a finish that's truly colorless.
> > --
> > Steve B.
> > New Life Home Improvement
>
> A water based urethane like, Diamond Varathane Will not darken the wood
> like a oil base. I installed a hardwood floor and used Diamond on it. I
> like the look.- Hide quoted text -
>
> - Show quoted text -

But he need exterior products, the UV protectors usualy give marine
products an amber color.

You are absolutely correct. I should have been paying attention to the
subject more closely! Sea fin is a good product for doors



Posted by ransley on May 15, 2008, 12:09 pm
> 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.

Test the door with paint thinner first, the panels you showed in the
photo need the most work, thinner will let you see if you did the job
right. Finishes darken wood

Posted by Norminn on May 15, 2008, 1:54 pm
Mikepier wrote:

>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.
>
>
Wood almost always darkens from a clear finish; maple the least. A good
way to test the effect
of clear finish is to wipe on solvent like mineral spirits - has
essentially same effect on color
but dries quickly. If I recall, your images of the partially stripped
door had a couple of sections
that had very light grain. This is common for doors that will be
painted, but might be less
desirable when you switch to clear finish. If the door will be in
strong sun or if the color isn't
uniform, I would paint it. What I saw that was stripped looked
(mostly) like pretty grain.

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