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Bullet proof exterior wood coating

2/29/16       
Jeremy Member

Hey guys,

I am in need of some help sourcing hey really durable, long lasting exterior wood coating.

We're building custom white oak windows and I need a finish to the exterior that will put up with years of weather. We have a full spraying operation, about all the equipment one could need. I'm just not real savvy on exterior coatings.

Solid, transparent, that really doesn't matter. I really just need something that will really stand the test of time.

What have you guys had good luck with?

2/29/16       #2: Bullet proof exterior wood coating ...
PainterDave Member

100% acrylic latex, not a "blend"

the higher gloss the stronger and cleaner it will stay IMO

2/29/16       #3: Bullet proof exterior wood coating ...
Phil Haisley

Sherwin Williams "Duration"

I normally spec 100% acrylic, but I made an exception for Duration. Mfr. wouldn't tell me what's in it but it really does hold up. I have it on my house. My painter has it on his house. I suspect it's an acrylic polyurethane blend, but I can't confirm this.

2/29/16       #4: Bullet proof exterior wood coating ...
Jeremy Member

Thanks guys.

I am really hoping to find options outside of your standard off the shelf paints. I have used just about all the sw lines and find that blocking, and overall durability are a problem. Most cure slowly and don't work well in a assembly kind of situation.

With a window having contact points a product that sets up hard enough to handle seal contact, and rubs, though flexible enough to deal with the natural breathing of wood.

I find that chemicals in plane cans with warning labels are harder to locate, though work far better than your mainstream "pretty cans"

If you catch my drift

Thanks guys!

2/29/16       #5: Bullet proof exterior wood coating ...
Leo G

How about using a UV Cure Powder Coating.

UV Cure Powder Coating

3/1/16       #6: Bullet proof exterior wood coating ...
kevin

sherwin williams F63FH3 . this is exterior polyurethane. available at their chemical coatings division.

3/2/16       #7: Bullet proof exterior wood coating ...
Robert Chickey Member

The best product I have ever used is called
D Dur. It is a Chemcraft product. I have used this and had more than 5 years of protection. I periodically check the coating applications and am still blown away by the performance. Check it out. You won't be sorry.

D Dur coatings

3/3/16       #8: Bullet proof exterior wood coating ...
Bart

Amazing how often this comes up. You're looking for a Unicorn. There is no such thing as bullet proof unless you can make your windows aluminum clad. Wood regardless of finish flexes, breaths, swells and shrinks. Anything will eventually fail. A marine grade two part poly finish would look/wear great until it fails and then is a total cluster to strip and refinish. You could go with epoxy stabilizers or impregnators to stabilize the wood for less movement. That's a lot of work. Personally I'd go with a top quality paint. Benjamin Moore Aura 100% acrylic is good product . I've used it on raw wood and also stripped stained/varnished windows and doors and recoated with Aura with good results. The most exposed to the sun windows/doors are good for 3-4 yrs. Longterm I would think ease of maintenance.

http://www.benjaminmoore.com/en-us/for-your-home/paint-products/au
ra-waterborne-exterior-paint

http://www.ics-ilva.com/exterior-waterborne-finis
hes.php

http://www.westmarine.com/buy/awlgrip--two-part-linear-polyurethane-en
amel--P004_121_002_525

3/3/16       #9: Bullet proof exterior wood coating ...
Alessio

I've also used Chemcraft's D-dur on exterior Maple restaurant tables and 2 Mahogany entrance doors with sun exposure. Supplier told me will get easily 5 years. 3 years later both items still looks great, and i know the restaurant tables get cleaned with chemicals even thought i begged them not to.

3/3/16       #10: Bullet proof exterior wood coating ...
denny Member

I am in line with Bart on this one.......
There is no magic wand here.
UV is the real Demon for outside finishes.
I still cling to many "solvent based" products indoors, but High Gloss oil base will be eggshell after just 6 months of sun.
High-Gloss, water borne, enamel from any of the big paint companies is the way to go.
Kelly Moore
Behr
Sher Wil
Benny Moore
Dunn Edwards
etc etc etc
If it does not get sun, I would go with oil enamel.
I painted the windows (outside) of 400 California Street, San Francisco, 30 years ago with oil enamel from Roy Anderson. The paint is STILL there, but the windows are inset and get almost no sun.
good luck

3/3/16       #11: Bullet proof exterior wood coating ...
denny Member

.....clear, not enamel in your case, but the same applies for water borne clears as well.
good luck

3/4/16       #12: Bullet proof exterior wood coating ...
Paul Snyder  Member

Website: finishing.tips

Here’s another vote for a good quality exterior primer and paint. They come with a lifetime guarantee and are definitely the longest lasting option and relatively easy to maintain.

Clear finishes on wood don’t last as long as paint, though some do last much longer than others. There’s a wide selection of finish types and a wider range of performance. One good source of information on the performance of exterior finishes is the wooden boat community. They run long term tests on all kinds of exterior finishes ranging from wipe on oil finishes (e.g., Teak Oil) to catalyzed polyurethanes. Note that some of the exterior finishes contain a lot of pigment to block the UV and are called stains.

I’m attaching a test report from Classic Boat magazine showing the results from two different test sessions. The chart box on the left lists the finishes they used for the first round of tests that started 11-1/2 years ago (from date of publishing). The chart box on the right is from the third round of testing and show the results after 5-1/2 years.

The winner from the first test is Colean polyurethane. It cracked at the sharp corners of the wood, but otherwise held up exceptionally well. Rounding the corners of the wood will help prolong the life of your exterior paint/finish. The winner from the second test is Awlgrip Alwood MA. Both products are 1K moisture cure polyurethane. Either of these finishes would be a good choice for longevity.

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

Exterior_Finishes_Comparison_Test_Classic_Boat_2015_04_April.pdf

Colean exterior catalyzed polyurethane

3/4/16       #13: Bullet proof exterior wood coating ...
Jeremy

I do appreciate all the responses guys. I would like to make clear that I understand that there will be no "Bullet Proof" Exterior coating. Mother nature is a beast and will beat wood, and finishes to death, I get that.

All in all, the contributions have been very helpful. With the vast knowledge that this forum has I was sure that some of you would have some products you used in the past with good results.

I had thought about an oil based enamel, though I have not had much experience with it. With the White Oak I would figure that a good wet coat to penetrate would work wanders.

2/27/20       #14: Bullet proof exterior wood coating ...
pat s gilbert

Does anybody have any idea what a permitted spray booth is worth in So Calif?

It's a 10' x 8' typical spray booth


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