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:


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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    Jeff C · 05/02/2014
    How long is unopened TWP 1500 stain good?
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    TWP Stains · 04/21/2014
    EdC, typically TWP dries within 12 hours or so but this does depend on the Series, Sun Exposure, and Temperature. In addition I suspect the wood did not dry enough after the prepping enough as 24 hours is not enough time. Sanding may also reduce absorption which can lead to a longer dry time. It will dry but it may take longer than normal.
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    EdC · 04/21/2014
    After cleaning, brighten and lightly sanding my new railings, I stained on the following day(Saturday). Both Saturday and Sunday were perfect 60 degree and cool breeze weather. It's Monday and many areas on my deck are still wet to the touch. Just how long does it take for the stain to soak in and dry? Would like to know before I begin on the deck.
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    TWP Stains · 03/31/2014
    Eileen, please read this about new wood and TWP:

    and this as to why TWP is better:
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    Eileen flynn · 03/31/2014
    Hi I m putting on stain for new wood deck in myrtle beach. Would I have to put on 2coats &how many yrs would your product hold up?it s a toss up your product,Sherman Williams or Cabot. Why should I use tsp. thanks
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    TWP Stains · 03/20/2014
    Tom, if it rains between cleaning and staining then make sure that the wood dries for at least 24-48 hours after the rain. Timimg to complete will vary drastically based on you and the application method.
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    Tom Camp · 03/19/2014
    If I clean & prep entire deck & pool deck,then it rains will it still be ready to stain? The deck is a 12 x 10 and the pool deck is 8x8 with enclosed lattice surrounding area. I figured 761 sq ft including lattice. Not sure how long it would take to complete job? Thanks Tom