Applying TWP (Total Wood Preservative) deck stain is something that most deck owners can do themselves. Using TWP wood stain will ensure a lasting finish on decks and many other exterior wood surfaces. TWP stain protects against moisture, preserves natural wood color, prevents mold/mildew, is easy to apply, and is the only EPA registered wood preservative.

Prior to applying any TWP wood preservative product, the wood surface should be cleaned thoroughly. Weather must be taken into consideration when staining a deck or other exterior wood surface. Follow these weather tips for TWP application:

Temperature

Air temperatures can affect the overall results of an exterior staining project. TWP Total Wood Preservative is best applied in temperatures ranging from 45-95 degrees with 60-80 degrees being the optimal range. The temperature should also not drop below freezing within 8 hours after the stain application. This could cause improper curing of the product.

If temperatures are too hot and/or applying in direct sunlight where the wood surface is hot to the touch, the stain can flash dry. This leaves the stain coat looking splotchy, uneven, and may have inconsistent coloring.

Rain in the Forecast

If the wood surface gets wet allow it to dry a minimum of 24 hours before attempting to apply TWP stain. This can vary depending on how wet the wood got, temperature, and the age of the wood. It is best to do a water test drop to determine if the wood is ready for stain. If the water soaks in right away then stain, if it beads, do not stain.

It should not rain 12 hours after applying TWP. The stain may be able to take some rain earlier but it depends on wood porosity. Because oil and water do not mix, the stain will not be affected much by a little rain if it has already soaked into the wood. On the other hand if the stain is still wet and sitting atop the surface, rain can cause separation circles or may completely wash the stain away.

Be sure to always check your local forecast prior to staining any exterior wood surface. This will ensure that TWP wood stain gives you the beautiful lasting results you expect.

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    Kevin · 09/22/2014
    I have read the algae can be a problem with oil based stains. Can you comment on how well TWP holds up to algae growth?
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    TWP Stains · 09/18/2014
    Tom F.:
    I'm paying a contractor to clean and stain my cedar fence with TWP 100 (the fence was installed new about 1 year ago). The fence was pressure washed a week ago and today the contractor began staining (the forecast stated no rain for next two days). The contractor finished staining one large section of the fence when a heavy rain shower started about 30 - 60 minutes after the stain application. The contractor stopped the work due to the rain and said they would return to finish the job after the fence has had a chance to dry. Should I be concerned about the large portion of the stained fence that was exposed to the steady rain shower within 1 hour of the application? What should I look for and what should now be done to ensure the fence is stained properly? Thanks!

    No you will be fine since it is vertical wood. There will be no issues.
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    Tom F. · 09/17/2014
    I'm paying a contractor to clean and stain my cedar fence with TWP 100 (the fence was installed new about 1 year ago). The fence was pressure washed a week ago and today the contractor began staining (the forecast stated no rain for next two days). The contractor finished staining one large section of the fence when a heavy rain shower started about 30 - 60 minutes after the stain application. The contractor stopped the work due to the rain and said they would return to finish the job after the fence has had a chance to dry. Should I be concerned about the large portion of the stained fence that was exposed to the steady rain shower within 1 hour of the application? What should I look for and what should now be done to ensure the fence is stained properly? Thanks!
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    TWP Stains · 08/03/2014
    Matt Showman:
    I finished staining my fence with 10% chance of rain; by the next morning the chances increased to 80% and did, in fact, storm. The stain was on for 17 hours before any rain. I checked the surfaces; I didn't see any runoff and the rain was beading on the woods surface. Does that mean the stain was already sealed and ok?

    You will be fine!!
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    Matt Showman · 08/03/2014
    I finished staining my fence with 10% chance of rain; by the next morning the chances increased to 80% and did, in fact, storm. The stain was on for 17 hours before any rain. I checked the surfaces; I didn't see any runoff and the rain was beading on the woods surface. Does that mean the stain was already sealed and ok?
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    TWP Stains · 07/02/2014
    PJ:
    Your product data sheet says to ensure application 2-3 days before rain, yet you advise in a comment thread 12 hours. Which is correct?

    In most scenarios it can handle a rain in 12 hours.
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    PJ · 07/01/2014
    Your product data sheet says to ensure application 2-3 days before rain, yet you advise in a comment thread 12 hours. Which is correct?
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    TWP Stains · 06/19/2014
    Robert Dodson:
    I've just cleaned my deck and plan to apply TWP 100. Previously the deck was treated with a water based, solid color stain (Behr). For the most part, weather, sun, and cleaning have removed all traces of it, but in some areas (shade and under mats) the old stain is still intact. Do I need to remove it? If so, what is the best removal method? Thanks.
    Rob Dodson
    Ps I found the lid on the 5 gallon can of TWP 100 hard to remove. As I plan to order another, please let me know the best way to get the lid off.

    Yes you do need to remove any solid stain for the TWP to work well. Probably sanding is best. Use a flat head screwdriver to pry up the tabs on the 5 gallon pail. Thanks!
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    Robert Dodson · 06/19/2014
    I've just cleaned my deck and plan to apply TWP 100. Previously the deck was treated with a water based, solid color stain (Behr). For the most part, weather, sun, and cleaning have removed all traces of it, but in some areas (shade and under mats) the old stain is still intact. Do I need to remove it? If so, what is the best removal method? Thanks.
    Rob Dodson
    Ps I found the lid on the 5 gallon can of TWP 100 hard to remove. As I plan to order another, please let me know the best way to get the lid off.
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    TWP Stains · 06/17/2014
    John Hult:
    how do I clean up the brush after applying TWP?

    mineral sprits
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    John Hult · 06/17/2014
    how do I clean up the brush after applying TWP?
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    TWP Stains · 06/16/2014
    Al Ressler:
    I cleaned, sanded and stained my deck last June with TWP 100. I have now once again cleaned it thoroughly and want to bring back the NICE RICH FULL color. Can I STAIN over existing stain w/o re-sanding?

    Al, yes just lightly was to remove dirt and apply one coat of the TWP.
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    Al Ressler · 06/16/2014
    I cleaned, sanded and stained my deck last June with TWP 100. I have now once again cleaned it thoroughly and want to bring back the NICE RICH FULL color. Can I STAIN over existing stain w/o re-sanding?
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    Patti Asmus · 05/27/2014
    Where can I buy TWP in central Wisconsin?
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    TWP Stains · 05/09/2014
    dmaffei:
    I just completed staining my old pressure treated deck with TWP1500 2 hours ago. Now, it looks like it may rain. Would it be advisable to cover the deck with a tarp until the threat of rain passes?

    That could create issues with proper drying and curing of the stain.
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    Don · 05/09/2014
    I just completed staining my old pressure treated deck with TWP1500 2 hours ago. Now, it looks like it may rain. Would it be advisable to cover the deck with a tarp until the threat of rain passes?
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    TWP Stains · 05/02/2014
    Tsteve a:
    How long should you stay off a deck after applying stain 101 ? Is average drying time 24 hours?

    Yes that should be good.
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    steve a · 05/02/2014
    How long should you stay off a deck after applying stain 101 ? Is average drying time 24 hours?
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    TWP Stains · 05/02/2014
    Jeff C:
    How long is unopened TWP 1500 stain good?

    Please read this: http://www.twpstainhelp.com/shelf-life-of-twp/
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    Jeff C · 05/02/2014
    How long is unopened TWP 1500 stain good?