Rain Before or After TWP – Dry and Curing Time of TWP

Protecting your exterior wood surfaces with TWP (Total Wood Preservative) is a project that most homeowners can complete themselves. TWP will preserve the wood’s natural beauty and shield it from the harsh elements. The user-friendly formula is easy to apply and maintain but care should be taken when considering when to apply the stain. Weather can be a tricky and create problems. Most of all rain should be avoided at all costs.

A perfect forecast for staining would be 1-2 days with no chance of precipitation. Prior to staining, the wood should air dry for 24-48 hours after it has been cleaned. If it rains within that window soaking the wood again then wait an addition 1-2 days before staining. It is important the wood is dry before staining otherwise moisture could be trapped under the stain creating an environment for mold and mildew.

In most situations, TWP will take approximately 4-12 hours to dry but it will take longer to fully cure. Check the forecast and confirm that rain is not expected for at least a day or two. Once the conditions are right and the wood is completely dry you can begin staining. It should not rain within 12 hours of applying TWP stain to any exterior wood surface. A quick light rain will most likely not harm the stain if it has already been absorbed. A heavy rain however may leave separation circles on the surface and ruin the finish.

If an unexpected rain does ruin your TWP finish it may be necessary to sand or strip the stain off and recoat it. This would be unfortunate and obviously an extra expense so plan your staining project around any potential rainstorms for the best results. When applied properly under the right conditions, TWP will provide a long lasting beautiful finish that can be enjoyed and maintained for many years to come.

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    Regina · 10/08/2021
    I have a deck with former TWP stain and removed a hot tub 10 months ago that left an 8' octagon of decking without any stain.  Can I stain the area with no stain first with one or two applications before going over the entire deck with the final coat to try and achieve an even coloration?
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      TWP Stains · 10/08/2021
      No. The only way to even this out is to strip it all off, sand it all to about 80 grit, and then coat.
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    Leah · 09/04/2021
    I completed using the cleaner and brightener yesterday and now the forecast has changed.  I'm not sure I'm going to have a window for adequate drying and staining times w/in 14 days.  What is the minimum drying time after cleaning and brightening?  If I have to wait more than 14 days after using the cleaner / brightener what are my options/steps?  
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      TWP Stains · 09/05/2021
      48 hours after prep or rain to stain. If longer than 14 days, lightly redo the prep.
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    Justin · 08/06/2021
    Rain is expected in the forecast but I’m staining my screened porch. If it’s windy enough a little rain might get on the edges but otherwise stays dry. Should I stain or wait? Is it the water itself or the humidity that’s the issue?
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      TWP Stains · 08/06/2021
      No water or rain can get on the deck while you are applying or until fully dry.
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    Lee · 06/29/2021
    My staining professional applied a blend of 100/200 series TWP stain.  We started getting rain about 40 hours after the staining was completed and has rained off an on for the past 3 days.  5 days after completion, I can still rub off a little bit of stain on a white paper towel.  Did the rain hurt the curing process?  So far I don't think I can see spots on the deck, but it does look slightly lighter in color than when the stain was applied.  It is my first time with TWP so I'm just looking for your opinion.  Did I make a mistake using a blend of 100/200 series?
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      TWP Stains · 06/29/2021
      Yes, you are not supposed to blend the 100 and 200 series as the 200 is for shakes and shingles and it has a high amount of non-drying oils in it. Tt should still cure and try though but it may take a couple of weeks. To help speed up the process, wipe down the entire floor with rags to remove the excess oil. Saturate all oil rags in water and lay flat to dry outside.
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        Lee · 06/29/2021
        2 questions:Is there paraffin oil in both the 100 and 200 series?  Since I just had my deck finished with a blend of 100/200 series and it is taking a long time to cure, my next staining I would like to use 100 series.  Is it ok to use 100 series the next time or do I need to stay with the same blend since that is what I started with on my new deck?
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          TWP Stains · 06/29/2021
          There is in the 200 Series, not the 100. You should strip and brighten next time if you want to use the 100 series to be certain the curing issues do not repeat.
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    Gerry · 06/25/2021
    I stained my deck last evening finished at 8:30 it rained unexpectedly after 4 hours wanted to apply a second coat today can't  because it is wet it will be sunny today can I apply a second coat tomorrow?
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      TWP Stains · 06/25/2021
      You may not need it. Post a picture after the rain dries off.
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    GERRY · 06/25/2021
    I stained my deck yesterday finished at 8:30 pm it rained unexpectedly  about 4 hours later does that mean it will peel immediately or over time
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    Juan Noriega · 06/17/2021
    I sanded my deck and had unexpected rain. If k allow to dry for for 48 hours can i apply stain or do I have to sand again?
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      TWP Stains · 06/18/2021
      No need to sand again. Just let the wood dry out.
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    jb · 06/11/2021
    i dont really have a choice to stain out of sunlight unless it is night time. help?? literally sun up to sun down on the deck. the only cloudy day in the next 5 is on saturday, friday has a 30% chance of showers. I am assuming my stain day is sunday due to that right now.. not cloudy
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    jb · 06/11/2021
    im fighting the mid 90s this week but no rain for 5 days. 90 seems to be the limit so stain in the morning and night. But - does staining in the am when it is 80 make an issue when it heats up to 94 during the day and the sun beats on the deck?  since it technically wont be done curing yet?
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      TWP Stains · 06/11/2021
      No. Heat later in the day rising is not an issue, it is when you are applying.
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    Nick Saucier · 05/08/2021
    I stained my deck on Thursday, I did a couple coats on the banisters and railings etc, but only got one coat on the floor. Can I apply a second coat this Sunday a few days later, when there has been rain in between the dates? (Been respecting drying times etc)
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      TWP Stains · 05/08/2021
      It may not take and dry sticky. When applying a second coat, it should be wet on wet. Do a test board and make sure it dries okay after 24 hours.
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    CJ · 05/05/2021
    We used the TWP 200 California Cedar this past Sunday 5/2. The deck is covered (screened porch) and it is still not fully dry (5/5). Any suggestions?
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      TWP Stains · 05/05/2021
      The 200 Series can take 2-7 days to cure and even longer if under a covered porch. Best to wait it out.
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    SL_PA · 04/27/2021
    Year old PT Pine.  Cleaned and prepped.  Weather here, getting multiple dry days is a major challenge.  No rain the past two days, but I'm racing the forecast (chance of rain late tomorrow evening) so started staining today at about 8:30 am.  Using 1500 Black Walnut stain.  At 9:30 am I'm about 2/3 done and have stopped.  It'll be 80's and totally clear today and during the day tomorrow, and deck is entirely in direct sunlight.  
    One complication and one question:

    I have one large piece of furniture (a fire pit) that I can't really remove from the deck.  Is 8-10 hours enough drying time to walk on fresh stain and set fire pit on it (it has small feet)?
    Also, still have some touch-up that needs done in board gaps.  Do I try to get those done today or wait until I have another 3-4 day window (if one ever comes)? 
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      TWP Stains · 04/27/2021
      -Should be fine with the fire pit.-Best to do touchups now.
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    Paul Agid · 09/12/2020
    I’ve used TWP every other year since the deck was built 10 years ago. This year I had it done for me, deep cleaning as directed, and two coats as directed. In A few areas that do not get direct sun The deck is not yet dry after five days. One place in deep shade is still quite wet. Should I wipe these areas with a rag to remove wet zones?
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      TWP Stains · 09/12/2020
      Rag and mineral spirits. Saturate all oily rags in water and lay flat to dry outside when done.
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    Anthony Strickland · 08/31/2020
    If it rains shortly after staining using TWP 100 series stain, can you use a leaf blower to blow off the water spots once it stops raining
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    Melissa wetzel · 08/03/2020
    Can I stain at night in Louisiana?
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      TWP Stains · 08/03/2020
      Late in the day is okay but it does not sunlight to cure. At night may be pushing it.
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    Liisa · 08/01/2020
    Hello, I refinished a friend's deck... Sanded, Gemini cleaner/brightener, waited for dry weather stretch. I finished staining and about 5-6 hours after finishing a stray rain came through with 0-10% chance of rain. :( Now there are spots. Can I try to reapply a very light coat now or should if I waited until spring would that be better and cover spots evenly? I'm attaching a couple photos before it rained taken at sunset and a couple pics two days later after it's dried.
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      TWP Stains · 08/01/2020
      Wait until Spring. Lightly clean room remove dirt first.
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    Tarrah · 07/22/2020
    Here are the photos with the deck completely dry. We stained on Saturday, July 11th. It rained 6 hours later and has rained every day since - non-forecasted pop-up showers.

    I can tell we need to wipe down some of the shiny parts with the mineral spirits but what can we do about the water damage in the photos attached?
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      TWP Stains · 07/23/2020
      The only way to fix the water damaged spots would be to strip it all and start over. Brightener after.
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    Louisa Piccione · 07/20/2020
    Used twp 1500 stain hired someone and it rained that night said he had to scruff up to reapply and I saw him using putty knife gouging the deck...do the water spots go away
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    Tarrah · 07/14/2020
    Sorry about that was typing on my phone - meant to say that every day there have been random pop-up showers that aren't forecasted and I am so worried about what this will mean for the deck. I cannot get a dry day for the life of me! Today it finally dried out as much as it has since Saturday night (the night after we stained) and now it is raining again. I truly hope we don't have to strip and start over.
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      TWP Stains · 07/14/2020
      Just wait until it fully dries and send a picture.
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    Tarrah · 07/13/2020
    We live in NC and stained the deck yesterday with TWP 1500 and finished around 530p. Zero rain in the forecast for the next 3 days but alas, a pop-up storm hit last night at 2am. It was brief but we have pools of water on the deck today. Should we allow it to just air dry or should we try to sop up with towels? Sweep the water off?
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      TWP Stains · 07/13/2020
      Just let it air dry.
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        Tarrah · 07/13/2020
        @TWP thank you! We had another non-forecasted quick 5 minute shower this afternoon before everything was dry back there. How long do you recommend waiting after application to move things like a grill and seating back on the deck (knowing we’ve had 2 short rains)?
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          TWP Stains · 07/13/2020
          24-48 hours.
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            Tarrah · 07/14/2020
            Here is a photo of the deck this morning- lots of water blotches but it’s not completely dry. Do I wait until completely dry and then send another photo? I’m so worried I will have to strip and re-do with my husband deployed ay yay yay!
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              TWP Stains · 07/14/2020
              Let it completely dry for a couple of days.
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                Tarrah · 07/14/2020
                Thankyou-I’mquitenervousastherainkeepscomingdailyinshort burstswhilenot beingforecasted. I trulyhopeitisnot goingtoruinthestain.
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                  TWP Stains · 07/14/2020
                  Sorry but no idea what you are asking?