log wash wood cleaner

Log Wash™ - Wood Cleaner

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Log Wash

five star


Log Wash is a liquid concentrate for cleaning log and wood surfaces.  It can be used as a maintenance cleaner or to prepare the surface of the wood for a new coat of stain or topcoat.

For preparing the surface of bare wood for a new coat of stain, Log Wash removes dirt, grime, pollen, and surface stains without harming the wood or the finish.  As opposed to bleach solutions, Log Wash does not upset the natural pH balance of the wood, thus preventing wood fiber damage and iron tannate stains. (To treat gray, UV-exposed wood, see Wood Renew).

The exterior of a log home is a settling ground for dust, pollen and other airborne contaminants that dull the surface and encourage mold growth.  A light cleaning once or twice a year will keep a home looking beautiful and helps prolong the life of the exterior wood finish.

Made in U.S.A. Made in U.S.A.



  • Gently Cleans Bare and Finished Wood

  • Safe for Log Chinking and Sealants

  • Environmentally Friendly

  • Removes dust, pollen, pollution, insect and bird excrement, etc.

  • SDS

  • Product Label


Shelf Life

  • 3 Year

Application Temperature

  • 40° to 90°

Application Methods

  • Garden pump sprayer


  • As needed

Special Instructions

  • Apply from bottom-up, rinse from top-down

  • Rinse thoroughly



Coverage Rate:

Makes 16 gallons of solution @ 1 cup / gallon water

Makes 8 gallons of solution @ 2 cups / gallon water

150-200 sq.ft. / Gallon of diluted Log Wash solution



five star Melissa on 04/11/2019 - "Seemed to do a good job removing dirt and debris before the staining process."

five star Jerry on 03/09/2019 - "I have used Log Wash twice on my house in the last three years. The first to prepare for re-staining and the second as an annual clean up. Both times the product has worked as advertised. Easy to use, easy on and easy off. Clean up was good and no damage to plants around the house. It is definitely one of my favorites."

five star Julie on 02/02/2019 - "We loved finding a product that we knew would be appropriate for our logs, which were filthy due to putting off washing for too long. The price was better than we expected for a specialty product too. It was recommended on several log home forums, and we'd recommend it too."

five star William on 01/12/2019 - "Very impressed with the ease of using the Log Wash, even as I'm brushing the material on you literally see it working the dirt and pollen away and it has never softened the finish on 14 log homes I have cleaned prior to applying another coat of Lifeline Advanced satin. It truly is a winning combination and am sold on all the Perma-Chink Systems products I have used in the past 15 yrs."

four star Robert on 06/15/2017 - "Our home was dirty from several years of not being cleaned so we tried your Log Wash product which came highly recommended. After washing wit the Log Wash the home regained it's luster and looked brand new!"

five star Mark on 04/13/2017 - "We just finished our annual maintenance wash of our home and it's still looking GREAT!!!! It's a really easy process, and between the wife and I we got it done really quickly. Lots of Log Wash left to use, as the concentrate goes a long way."

five star Riley on 4/4/2017 - "We were told about the Log Wash product when we had finally decided to use Lifeline Interior Lt Natural and Acrylic Gloss as our finish for our interior log sided walls. We used 1 cup Log Wash solution per 1 gallon of warm water ratio as indicated. I was very impressed with how it removed the dirt, dust, and buildup on the walls. After cleaning and now staining/sealing, our walls look great!!!"

fence bafive star S Purdy on 01/17/2017 - "I have used wood renew which really helps to remove the dark grey sun damaged moldy areas on the fence. It works better than you think. It almost melts it off that wood!! I've also used log wash which is like washing your car and gets off all the extra dirt even if you don't see it and leaves you with a good clean base to work with."

five star J Stonecypher on 02/15/2016 - "Man that Log Wash is a good product. Also our Lifeline Ultra 7 is fantastic, I can’t believe it’s water based."

five starS Michelman on 01/13/15 - "Logwash did such a great job getting my house clean. It's something I keep on hand."

five star Jesse J on 01/08/16 – "I attended a Saturday event in Colorado and was so very surprised that my dingy logs were just dirty. I picked up a gallon of the Log Wash and in just an afternoon my home looked like new again! Thanks Perma Chink!!"

five star J Schraeder on 08/03/15 – "Your Log Wash is beyond amazing. It has been a longtime since a product exceeded my expectations. It had been years since my home was cleaned and after Log Wash looks like new!"

five star J Thorsness on 05/18/15 – "Applied to 18 year old spruce logs with a medium stiff scrub brush and worked up a good lather. Let sit for a few minutes then rinsed with a rag and copious water. Remarkable result! Just as advertised. I look forward to putting on a new coat of stain. They'll look like new!"

five star M Gelfer on 04/02/15 – "Log Wash did such a great job getting my house clean. I use it all the time."

five star J Jesse on 03/29/15 – "I attended a Saturday event in Colorado and was so very surprised that my dingy logs were just dirty. I picked up a gallon of the Log Wash and in just an afternoon my home looked like new again! Thanks Perma Chink!!"

five star M Silverthorne on 03/23/15 – "I have a log home in Colorado that I inherited a while back. The home had sat for years and I was concerned about the dingy discoloration on the home and felt quite discouraged about how the home looked. I heard from a friend about Log Wash. I purchased some and used it on this home and was so pleased at the results after using this product, all I can say is it worked a “MIRACLE”, THANKS Perma-Chink for making such an awesome product."

four star J Goulet on 03/05/15 – "I recently placed an order on-line for some Log Wash to clean the exterior walls of my log cabin. I was pleasantly surprised that they offer specials every month on the web. I will be keeping an eye out for the coupon deals… need more stain in the future."

five star J Pike on 11/05/14 – "The first time I used log wash to clean my logs before staining my new home I thought it was a waste of time, but I decided to follow Perma-Chink’s instructions to the letter so I washed the logs. At first I just did a few logs with water and almost nothing was coming off as I expected because I felt the logs were clean. Then I washed the same logs with Log Wash to compare. I couldn’t believe the difference! The Log Wash removed dirt that I didn’t realize was there. I am now a believer and I religiously wash my home with Log Wash in the Spring and Fall. Thank you Perma-Chink!"

five star K Wright on 04/26/2014 - "What an impressive cleaner Log Wash is! We originally used it as a prep cleaner for our log home on both the exterior as well as the interior right after it was constructed. We have since used it several times as a maintenance cleaner and the house still looks great!"

five star R Yetton on 04/05/2012 - "We bought one gallon originally to maintain the beauty of our home and we’re still using it every year. It’s so easy to work with just spray on and rinse off with our garden hose and we’re looking like new again!!"





Over the past years, we have discovered many things about cleaning wood. First and foremost is that chlorine bleach should never be used to clean your wood. In addition to its potential for damaging wood fibers, its use and misuse contribute to a number of problems including the loss of film adhesion, discolorations due to tannin extraction, and the formation of iron tannates, streaks, blotches, and premature failures of the finish system.

We have also discovered that a number of wood and deck cleaners available at paint and hardware stores, home improvement centers, and Do-It-Yourself outlets contain components that can interfere with the proper performance of water-based finish systems.

With this in mind, the ONLY cleaning products we recommend for use with our finishes are those products supplied or specifically approved by Perma-Chink Systems, Inc. We have tested our cleaning products with our finish systems and have confidence that when properly used and applied, their use will result in the best possible appearance and performance of a Lifeline™ finish. We cannot say the same about the use of other types and brands of wood cleaners or brighteners and strongly discourage their use before applying any of our Lifeline finish systems.


Log Wash™ – A general-purpose, low-pH cleaner concentrate for removing dirt, grime, pollen, stains from surface mold and mildew from bare wood surfaces and existing finishes. Log Wash will also remove some types of brown stains and lighten the color of bare wood. Log Wash is not effective for removing grayed, oxidized wood fibers. Whenever bare wood surfaces are left exposed to the elements for more than seven days, the surfaces should be cleaned with a solution of Log Wash before the first coat of finish is applied.

Wood ReNew™ – A concentrated powder that is dissolved in water and applied to bare wood. When used with a pressure washer, it will remove gray, oxidized surface wood as well as dirt, pollen, mold, and mildew. Although Wood ReNew usually lightens the color, it can occasionally darken the wood depending on the wood species and the types of chemicals previously applied. Wood ReNew is the product of choice for removing mill glaze from new wood surfaces.



Step 1: If the wood has not grayed, wash the surface with a two cups per gallon Log Wash™ solution and a pressure washer no more than seven days prior to staining. Apply and clean from the bottom up and rinse from the top down. Rinse well and allow the wood to dry.

Step 2: If there are signs of gray weathered wood, use Wood ReNew according to the application instructions along with a pressure washer.

Step 3: If after Steps 1 or 2 there are still dark streaks or discolorations on the surface, use a solution of Oxcon™ oxalic acid on the entire wall according to the directions for use.  Be sure to dilute the Oxcon concentrate with four parts water. Apply the solution from the bottom up, begin washing it off starting at the bottom then rinse thoroughly from the top down. Be sure to completely rinse the Oxcon solution off the wall and allow the wood to dry before staining.  Never use Oxcon unless it is absolutely necessary.


New log siding must always be cleaned, since it presents an especially difficult challenge to a finish system. Typically used in high exposure locations such as dormers and gable ends, siding is often manufactured from lower quality wood than logs, and frequently green wood. This makes siding more susceptible to twisting, warping, and cracking.

Since siding does not have the high thermal mass of full logs, during the summer months its temperature can range from 70ºF to 160ºF or higher during the course of one day. This puts a lot of mechanical stress on the siding and its finish, resulting in small fissures forming on the surface. Rainwater can then enter these fissures and get into the wood, behind the finish. Log siding is typically milled quite smooth and often has a mill glaze on the surface, which if not removed, prevents the proper adhesion of the finish.

Step 1: To remove mill glaze and prepare siding for the first coat of finish, clean and pressure wash the surface of the siding using Wood ReNew no more than seven days prior to staining. Apply the solution of Wood ReNew and pressure wash from the bottom up, and rinse from the top down. Allow the siding to dry before staining.


Step 1: If the surface of the wood has been sanded or media blasted, it is not considered clean. Wash the surface with a two cups per gallon Log Wash solution and a garden hose (pressure washing is not required) no more than four days prior to staining. Apply and clean from the bottom up, and rinse from the top down. Allow the wood to dry before applying the first coat of Lifeline pigmented stain or Prelude™ Clear Wood Primer.


Step 1: If a finish has been removed using a chemical stripper, there may still be some types of discolorations present on the wood. Cleaning with a two cups per gallon Log Wash solution and garden hose, or pressure washer, will remove many types of tannin (brown) stains and even out the color of the bare wood surfaces. If the surface feathered during the finish removal process, and the feathers were removed by sanding, or with an Osborn brush, it will be necessary to clean the surface again with Log Wash. Use a two cups per gallon solution and apply and clean from the bottom up, then rinse with a garden hose from the top down. Allow the wood to dry before applying the first coat of pigmented stain.

Step 2: If, after the finish has been removed, there are areas of grayed wood fibers, apply Wood ReNew according to the directions and clean the surface with a pressure washer. Rinse well and allow the wood to dry before applying the first coat of pigmented stain.


Step 1: Add 1 gallon of water to your sprayer then add approximately 2 cups of Log Wash. If you add the Log Wash first, the sprayer will fill with foam. Be sure solution is mixed well.

Step 2: Spray the surface with the mixed Log Wash solution. Start at the bottom and work up. Allow 10 to 15 minutes contact time. Do not allow the surface to dry.

Step 3: If necessary, scrub the wall starting at the bottom and work up then rinse from the top down until you see no more foam running down the wall.



Step 1: Use Wood ReNew to remove grayed surface wood.

Step 2: Only measure out enough Wood ReNew to add to a few gallons of water (0.8 cups per gallon) at a time. You need to use whatever you mix up within 1 to 2 hours.

Step 3: Pour the Wood ReNew into a pail that contains the water. Do not mix Wood ReNew in a sprayer.

Step 4: Mix the Wood ReNew with the water using a paint mixer and an electric drill.

Step 5: Stir for about five minutes or until no undissolved granules are visible. Allow the solution to thicken for 10 minutes before using.

Step 6: Apply the Wood ReNew solution to the wall with a mop, broom, or car wash brush. Start at the bottom of the wall and work up. Allow the solution to remain on the wall for 10 minutes.

Step 7: Pressure wash starting at the bottom of the wall. Work on 2 or 3 courses of logs at a time. Hold the wand at a 30 to 45 degree angle to avoid feathering the wood.

Step 8: Once the entire wall is pressure washed, rinse the wall starting at the top and work down. At this stage water volume is more important than pressure.

Step 9: Never judge the effectiveness of Wood ReNew or any other cleaner while the wood is still wet.

Step 10: Once the wood dries, many of the dark discolorations will disappear. This is the same wall that appears in the previous step after drying for three hours.cleanwoodsurfaces2



No matter what product you use to clean bare wood, nothing is more important than making sure you have adequately rinsed the surface. Any chemical residue remaining on the wood can have serious consequences later on. We always recommend using pH strips to make sure that the surface of the wood has been sufficiently rinsed, preferably to a pH of between 6.5 and 7.5. pH strips are available at most pool supply dealers, aquarium supply shops, and Perma-Chink Systems, Inc. They are not expensive and are very easy to use.


Interior walls and ceilings must be cleaned prior to finishing. If your home is completed, you are somewhat limited in the available cleaning methods since the use of a pressure washer is typically not an option. If you want your interior walls smooth, sanding may be your best and only choice. As opposed to exterior surfaces, you can sand interior wood surfaces using 120 grit sandpaper or Osborn brush.

Although your interior wood surfaces may appear to be clean, they are never clean enough to apply a finish to them without first washing them with an appropriate cleaning solution like Log Wash.

Step 1: Mix one half or one cup of Log Wash Concentrate with one gallon of warm water, if available, in a pail.

Step 2: Apply the Log Wash solution to the wall with a rag or sponge starting at the bottom and work up. Allow the solution to remain on the wall for at least 10 minutes.

Step 3: Using a clean rag or sponge and a pail of clean water, wipe the Log Wash solution off of the surface. Frequently rinse the sponge or rag in the pail of water and occasionally exchange the water in the pail with clean water.

Step 4: Allow the surface to completely dry before applying the first coat of finish.


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