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Frequently Asked Questions (FAQ)

  • How to calculate the amount of boat dock stain needed for a project?

    For a penetrating oil-based stain, it is safe to assume 150 square feet of surface area per gallon of stain. Get the total surface area of your dock in order to calculate the amount of dock stain needed for it.

  • Is boat dock stain better than paint?

    The choice between a boat dock stain or paint really comes down to personal preference. If you want a solid color, it's probably best to go with paint. If you want to enjoy the natural look, choose a penetrating oil-based stain made with transparent oxide pigments.

  • Which wood siding stain is best for pressure-treated and untreated woods?

    You can use any Woodrich Brand Stain/Sealer on pressure treated or untreated wood. Woodrich Brand Timber Oil is the easiest siding stain to maintain over time.

  • Are wood siding stains oil-based or water-based?

    Wood siding stains can be either water based or oil-based. Oil-based wood stains tend to last longer on exterior applications.

  • What is the longest lasting wood siding stain?

    For wood siding, it is important to choose a deep penetrating stain. It is best to avoid and film-forming products that lay up on the surface and act like paint. Film-forming finishes will tend to crack and peel as the wood expands and contracts with the outside temperature. A high-quality penetrating stain works on the inside and can expand and contract with the wood.

  • How to apply wood siding stain on houses?

    A sprayer is usually the best application tool to use for large surface areas and houses. However, a combination of spraying and back brushing with a large dry brush works well.

  • Can exterior wood siding stain be used indoors and vice versa?

    There are some differences in the way indoor and outdoor stain is formulated. Generally speaking, it is never a good idea to use an indoor stain outdoors. Outdoor stain can be used for indoor applications. If the wood can be stained outdoors and then brought inside after that stain has fully dried.

  • How do I know which color is best to use for my log home stain?

    When selecting a log home stain color, you can choose whatever color you think looks the best on your logs. Woodrich Brand offers sample color kits. This allows you to test the individual colors yourself and choose whichever you think is best.

  • Which is best used when applying log home stain, brush or spray?

    For large surface areas, a sprayer is usually the best application tool. A combination of spraying and back brushing with a large dry brush works well.

  • How long will the log home stain last?

    Woodrich Brand Timber Oil should be reapplied every 3 to 4 years on a south-facing wall in full sun. Surfaces that remains mostly in the shade will last much longer between maintenance applications.

  • What is the best log home stain for soft and hard woods?

    For soft woods, Woodrich Brand Timber Oil performs the best over time. For exotic hardwoods like Ipe or Garapa you should choose Woodrich Brand Hardwood Wiping Stain.

  • How long will a fence stain last?

    Woodrich Brand Timber Oil should be reapplied every 3 to 4 years on a south-facing fence in full sun. A fence stain that remains mostly in the shade will last much longer.

  • Which tools are best to use in applying fence stain?

    For large surface areas, a sprayer is usually the best application tool. A combination of spraying and back brushing with a large dry brush works well to apply a fence stain.

  • Is fence stain water-based or oil-based?

    Fence stain can be either oil-based or water-based. All Woodrich Brand stain formulations are oil-based.

  • Can you use fence stain on decking?

    Woodrich Brand products suit all woodworks. Thus, you can use them on any type of exterior wood project, like fence stain on decking.

  • When to apply fence stain after the rain?

    As a "rule of thumb", it's best to let the wood dry for two days after washing or heavy rain. Although sometimes this is not practical. Woodrich Brand Timber Oil and Hardwood Wiping Stain can both be applied to damp wood. Just give the stain extra time to penetrate the wood. You can also expect the finish to dry more slowly if the wood is not completely dry when you apply the stain.

  • What deck stain lasts the longest?

    For exterior wood projects, an oil-based deck stain will usually last the longest.

  • Which deck stain is best for pressure treated wood?

    A deep penetrating, oil-based, deck stain is the best choice for pressure-treated wood. Water-based stain and other film-forming sealers will just lay on top of the surface and fail relatively quickly on pressure-treated wood. When you choose a penetrating stain, be sure to select a product that uses transparent oxide pigments. These micro-ground pigments are ideal for getting down into the wood and to help provide lasting protection.

  • Is deck stain applicable for both hard and soft woods?

    You can stain any type of wood. It is important to choose the right type of finish for the kind of wood you are working on. In general, a softwood like pine or cedar calls for a deep penetrating stain. Hardwoods like ipe and garapa benefit perform much better with an oil-based wiping stain.

  • Can the stain colors be mixed?

    Absolutely! Woodrich Brand uses transparent oxide pigments. So mixing the colors together is extremely easy.  We offer sample color kits so that you can test our stock colors. You can also experiment with blends to find the perfect color tone for your project.

  • Where can I find a Color Chart for the Timber Oil Deep Penetrating Wood Stain? I spent half an hour searching to no avail.

    You can visit the Gallery page and use the gallery search feature.  Type in the kind of wood you have and it will display pictures of the different colors on your type of wood.  We also offer a sample color kit that you can order to test the different colors yourself.

  • What is the best stain to use on pressure treated pine?

    Timber Oil deep penetrating stain is a great choice for new and aged pressure treated pine wood.  New pine should be cleaned and brightened before staining.  The Brown Sugar or Amaretto colors usually look best on pressure treated pine.

  • What is the best stain to use on cedar?

    We recommend Timber Oil deep penetrating stain for new and aged cedar wood.  Timber Oil does an excellent job of penetrating cedar wood.  The stain has a high degree of clarity because it is tinted with transparent oxide pigments.  It dries very natural and you can still see all of the grain and detail of the wood.

  • When should a new deck be stained or sealed?

    The sooner the better.  A new deck will begin to discolor in  as little as two weeks when  its exposed to the sun.  If pollen spores settle into the grain of the wood, they can become a food source for mold or mildew.  Staining and sealing the wood will help  protect it from the elements.  When protecting new wood for the first time it is usually best to clean and brighten the wood prior to applying any finish.

  • How do you remove the old stain once the HD80 does its thing? Brush, scraping, and/or pressure washer?

    It is easiest to use a pressure washer after the HD-80 has softened the existing finish. For larger jobs, it is a good idea to test the HD-80 first to be sure that it is going to effectively remove your finish. There are sample kits available for testing.

  • Do you need to apply another product after to neutralize before applying the new stain?

    Yes. You neutralize with Woodrich Brand Citralic Brightener / Neutralizer before applying the new stain.

  • I have 2 coats of semi-transparent stain on my decks/stairs - should I use this product to remove it?

    HD-80 is a heavy-duty wood stripper. It is effective at removing most semi-transparent deck stains and sealers. HD-80 is a caustic material. So care should be taken to protect surrounding vegetation such as grass and plants. We also recommend the use of protective clothing to protect the skin and eyes. Woodrich-Brand also manufactures EFC-38 which is a mild stripper that will effectively remove most oil-based semi-transparent deck stains and sealers. If you are not sure which product is best suited for your project, you can order a product sample kit. Then test them each to see which you prefer. You can also contact the Woodrich-Brand project support hotline at 636-288-8512 if you have questions before you order. 

  • Can I use this to strip a thin layer of paint off of wood shingles on my garage?

    I believe that you would get better results with a paint stripper. This product works best for removing wood stains and sealers.

  • Will this remove behr deckover? I've tried just about everything else and nothing works.

    No. This product will not effectively remove that finish.

  • I have a 101 year old barn that has peeling paint everywhere will this work to remove all the old latex paint and will it effect the new coat latex?

    I am not sure this would be the best option for removing latex paint. You might consider trying the sample test kit first to be sure it is going to be effective. If the stripper is effective at removing the old paint, it will not effect the new application, as long as you rinse thoroughly and neutralize after using the stripper.

  • Is this product safe to use around outdoor plants? To protect surrounding plants do I need to cover all of the plants?

    You should protect the plants from overspray, while applying the HD-80. You can either use a spray shield, or cover the plants while you apply the HD-80

  • Does it remove acrylic stains? I have tried several stain strippers that don't work.

    Yes in most cases HD-80 will remove acrylic wood stains. We do have sample kits available if you would like to test it before you buy.

  • What specific type of personal protective equipment should I use when applying/removing the stripper (shoe covers, gloves, coveralls)?

    You want to protect your skin and eyes when applying this product..

  • Will this strip a penetrating (oil based) stain from cedar?

    Yes, it should easily strip a penetrating oil based stain.

  • How to use and apply to vertical siding?

    Apply HD-80 to a vertical surface by using a pump up sprayer.

  • Will this be strong enough to remove 10x Restore?

    No, I don't believe this is the right type of stripper for your project.

  • Will this work on 50 years of both Oil based Paint and Latex on top of that?

    No this product will not work for that application.

  • Can this product be used on oak furniture with a dark stain?

    HD80 can be used to strip stain from the furniture. You might consider purchasing the test kit first.  You need to be sure if it will be effective at removing the specific dark stain on your furniture.

  • Should I remove elastomeric coating?

    I would recommend starting with the sample kit to test for efficacy.

  • Is this pre mixed in liquid form, or dry powder? Can I use a pump sprayer to spray it on or will it gob up and splatter?

    It is a dry powder. Mix it with water in a five gallon pail, then transfer it to your pump sprayer.

  • Can I use this on a painted deck?

    This stripper is most effective at removing wood stains and sealers. This stripper will not remove latex paint. It will remove some oil based paint. There is a sample test kit available. If you are unsure what is on your deck, it is a good idea to test the stripper for effectiveness, before ordering enough to complete the entire job.

  • How many gallons does the stripper mix make, and how many gallons does the brightener mix make?

    For "normal" stripping jobs, you can make 5 gallons of the stripper. Adjust the strength by adding more or less water. The brightener also makes 5 gallons.

  • I have about a third of a gallon from two years ago, in the original container. Is there a shelf-life for the stain?

    This product will "skin over" after it has been opened. This film on the surface protects the product underneath. The surface area of the product that is exposed to air in the container determines the thickness of this skin. In your case, if the bottle was sealed well, I guess that you have at least a quart of stain that can still be used.

  • Is this done using a sprayer?

    Yes, that is the fastest way to apply.

  • Will this remove paint from aluminum Anderson windows?

    This product will not remove paint that is in good condition. If the aluminum windows are well aged and heavily oxidized, the cleaner may remove some of the surface oxidation. Thus, leaving what looks like either clean or faded areas.

  • Does EFC-38 remove paint?

    No, this product is not an effective paint remover.

  • Will EFC-38 remove sikkens cetol srd stain?

    No, HD-80 would be a better choice for that finish removal. Sample test kits are available to help you determine the required product dwell time.

  • Would this work for cleaning logs in a Log Cabin?

    Yes. EFC-38 is a perfect choice for restoring the weathered exterior of log cabins.

  • Our pressure washer can be used to apply cleaning products at low pressure. Can this product be used with a pressure washer if mixed right?

    This product is designed to be mixed with water and then applied at "full strength" using a pump-up garden sprayer. Injecting the solution using a power washer would dilute the product too much.

  • We stained our deck last summer, will this take the stain off? That's what I'm wanting it to do...

    It depends on what type of stain it is. This product will remove most true oil based stains and sealers. We also offer a Heavy Duty Stripper called HD-80, for solid stains and other hard to remove finishes.

  • What do you use to clean up? Mineral spirits or soap and water?

    Use Mineral Spirits in order to clean up.

  • Is this a solid color stain or semi-transparent?

    This stain is not a solid color but rather semi-transparent.

  • Is there a color chart to see the colors available?

    There is a sample chart at woodrichbrand.com. There is also a sample color kit available.

  • Is this made for cedar? Will it repel bugs?

    This product can be used to protect cedar wood.
    It does not attract bugs, but at the same time, it is not sold as a bug repellent.

  • Mildew resistance and UV protection in semi transparent stain?

    Yes. These products work best in order to protect the wood from both.

  • Is there an msds for this?

    Yes. Please contact customer support at 866-536-7393 to obtain an MSDS. You can also contact a Project Support Specialist at 636-288-8512. They will help you with this or any other question you have about Woodrich-Brand products or the wood restoration and preservation process in general.

  • Is this a powder or crystal that needs mixed and if so how many gallons will this product make?

    Yes. This product needs mixing with water. This size will make 20 gallons at full strength.

  • Is HD-80 harmful to humans or pets?

    Yes! Wear protective gear when using this product. Read all MSDS and first aid material completely before beginning. Knowing what to do if something goes wrong while using HD-80 will help minimize the risk of serious injury. Keep animals away from areas (confined in home is best) where HD-80 is being used. Keep children and bystanders away while using HD-80.

  • Will HD-80 harm plants or grass?

    HD-80 will produce chemical burns on plants and grass and will eventually kill them if precautions are not taken. Spray all vegetation with water that is in the vicinity and cover sensitive plants in close proximity with plastic to avoid exposure.

  • Can HD-80 be used on other surfaces?

    Yes. You can use HD-80 to clean concrete, vinyl siding, brick, Trex, and also PVC.

  • What would happen if I applied a stain without neutralizing HD-80 ?

    Not only will the end result be less attractive, most assuredly the finish you apply will fail prematurely.

  • The wood has turned dark after treatment! How do I get it to lighten up?

    Use Citralic Brightener/Neutralizer to brighten up the wood. This helps to neutralize any sodium hydroxide after stripping. Citralic also returns the wood to it's natural color.

  • Will HD-80 remove mold & mildew or should I add bleach?

    In most cases HD-80 will easily remove mold and mildew.  If there is an extreme build up of mold and mildew you can add one cup of bleach per gallon of product.  Please note that bleach can damage the wood and should be rinsed as soon as possible.  (NEVER mix bleach with EFC-38)

  • What if I can't see the wood under a solid color stain? How do I tell if HD-80 has gone through all the layers?

    The best method is the dry scratch test.  Use a stir stick or similar item to scratch at the finish.  When it can easily be removed down to bare wood it is time to rinse.If any stain is still present, reapply HD-80 again until it is easily removed.  We recommend that you perform several scratch tests in different areas prior to rinsing.

  • How long does HD-80 take to work?

    Depending on the coating you are removing, it can take from just a few seconds to as much as 15 minutes per layer of finish being removed.

  • How do I know when HD-80 is working?

    The coating will change color and the wood will turn dark.  Use a scratch test to determine when the existing finish has been fully emulsified and is ready to strip.

  • What if I mix too much and have more than is needed for the job, will any left over HD-80 go bad?

    No. HD-80 is stable in solution and has a long shelf life. You can premix it with water into a concentrate for use later. Just dilute it in order to meet your needs.

  • How much HD-80 should I use per gallon of water?

    Mix 8 oz (1/2 LB) per gallon of water for full strength.  In dry measure that is about 2/3 cup.  You can then dilute it up to 4 to 1 with water depending on the job at hand.

  • What finishes will HD-80 remove?

    HD-80 works on removing oil based sealants, latex or alkyd stains, semitransparent or solid color stains, polymer/resin based coatings, acrylic based coatings and paint. Removes SIKKENS, BEHR, CABOT, PENOFIN, TWP, CWF, READY SEAL, WOLMAN, OLYMPIC, CUPRINOL, ABR, FLOOD, and some paints.

  • Can HD-80 be used on other surfaces?

    HD-80 can be used to clean concrete, vinyl siding, brick, Trex and PVC.  You can also use EFC-38 as a safe roof cleaner

  • Do you also need a neutralizer after use of this product before staining?

    This product is a kit that comes with both the cleaner and the neutralizer. The green label product is a the brightener/neutralizer.

  • It says it covers 3000 sf is that combined or 3000 sf each the cleaner / brightner?

    Each the cleaner and the brightener will cover up to 3000 square feet.

  • Can this be mixed with cold water?

    Yes. You can use cold water in order to mix it with.

  • Will this work on white or red oak in an exterior application?

    Yes. You can apply this product to oak, whether white or red and in an exterior application.

  • Would this work on sapele doors?

    Yes and no. You can stain the doors with this product. However, I would not expect it to last very long, more so if the doors are in the direct sun. This product is designed to dive deep into the wood in order to provide lasting protection. Sapele wood is similar to Mahogany. It has a density of about 640 kg/m3 or about 40 pounds per cubic foot. For a hardwood with that density, you might want to consider using a Hardwood Wiping Stain like this: Hardwood Wiping Wood Stain.

  • Can this be rolled on? And do you need to sand your deck first?

    You will only need to sand the deck if it rough or splintery. It is important not to over sand the wood.
    You can use a roller to apply, however this product is thin and tends to fling if you roll too fast.
    You might consider applying the stain to the wood using a pump-up garden sprayer and then laying it out with a stain pad applicator on a pole.

  • Do you need to apply sealer later or is it stain plus sealer in one like most stains?

    You will not need to apply a sealer later.

  • Which would be the darkest of the stains? Even though it is semi transparent.

    Amaretto would probably be the darkest of the stains on most types of wood. The color of the wood itself plays a big part in the final finish color.

  • Water or mineral spirits clean up?

    Use Mineral Spirits in order to clean up.

  • Will this wipe off of vinyl siding with mineral spirits or equivalent?

    Yes it will wipe off as long as the stain has not completely dried on the surface.

  • Hi, can you use a sprayer? If yes which one? For decking and railings.

    Any pump style garden sprayer will work. One with a fan tip will give you more control during application.

  • Any temperature considerations re: application? Worried about low temps at night.

    You should be good as long as it is not dipping down below freezing.

  • I am thinking of buying this for my deck. Do I need to remove the existing paint with power wash before I can use this?

    Yes. You should not apply this stain over an existing finish.

  • Is this required for new wood?

    It is not always required that you use this product(s) before staining. It depends on the type of wood and its condition. As well as the type of stain you will be applying to the wood.

    You can test your wood to see if it will readily accept stain by sprinkling the surface with water. If the water absorbs quickly into the wood, it is likely that the wood will also accept stain. This is so if you are using a stain that is compatible with the new wood application. Check if the water stands on the surface or beads up when you sprinkle water on the wood. If so, we recommended that you go through the cleaning and brightening process before applying a stain. It is also a good idea to use the cleaner and brightener. That is if you believe your new wood has been outside long enough to be exposed to pollen. Pollen is an excellent food source for mold and mildew.

    Finally, if your new wood has been outside long enough to begin turning grey, it is recommended that you use the cleaner and brightener to remove the dead grey wood fibers on the surface. So that your stain finishes evenly and without splotches. 

  • Does it remove stains left by potted plants?

    Each potted plant stain is different so it is difficult to answer this question directly (absolutely). Most likely yes, following the two step process will remove the stain left by a potted plant. Potted plant stains are usually one or a combination of dirt, "the green stuff" and fertilizer stains. The first will work to deep clean and help remove the dirt and organics. The second step will neutralize the wood and brighten any discoloration caused by contact with fertilizer that has leached from the potted plant. Sometimes potted plant stains can be stubborn and require more than one application of the cleaner and/or brightener. There is a sample test kit available if you prefer to test the efficacy of the products before you purchase enough for the entire job. 

  • Can this product be applied with a tank sprayer? I understand that I may need to filter first with a fine mesh filter bag.

    Yes. It can so long as the sprayer is compatible with acid. Most sprayers are.

  • Is EFC-38 harmful to humans or pets?

    Not harmful for pets if you use common sense and handle it properly.  EFC-38 was designed in order to be safe for the user and for the environment.

  • Will EFC-38 harm plants or grass?

    Nope, unless they are extremely delicate such as lacy ferns or soft petel flowers and they are in direct sunlight.  In such cases the water causes the sun to burn the plants.  Shake the excess water off to prevent burning.

  • Do I always have to use a Brightener/Neutralizer after I use EFC-38?

    No, EFC-38 finishes off close to neutral.  As long as you rinse well you do not have to use a neutralizer.  You may wish to brighten that extra bit to help make your work stand out among the competition.

  • The wood has turned dark after treatment! How do I get it to lighten up?

    Use Citralic Brightener/Neutralizer in order to brighten up the wood.

  • Will EFC-38 remove mold & mildew or should I add bleach?

    In most cases EFC-38 will easily remove mold and mildew.  You should see it work drastically when it comes in contact with mold or mildew.   If there is an extreme build up of mold and mildew you can apply additional EFC-38 to fully eradicate the infestation. (NEVER mix bleach with EFC-38)

  • What if I can't see the wood under a solid color stain? How do I tell if EFC-38 has gone through all the layers?

    If you are working on a solid color stain you should be using HD-80.  EFC-38 is only going to make the finish nice and clean.

  • How long does EFC-38 take to work?

    It is going to do it's job in about 15 min.  If you have a stubborn finnish you may allow for additional dwell time keeping the surface wet.

  • How do I know when EFC-38 is working?

    The coating will change color and any mold or mildew should activly fizz up and turn white.  Use a scratch test to determine when the existing finish has been fully emulsified and is ready to strip.

  • What if I mix too much and have more than is needed for the job, will any left over EFC-38 go bad?

    Use EFC-38 within a couple of hours from the time of mixing.  Beyond that, it loses its effectiveness as a stripper.  You should also take care to keep the powder dry when you store it.  The shelf life of the dry powder is 6 months so be sure to keep your supply fresh.

  • How much EFC-38 should I use per gallon?

    Mix 8 oz (1/2 LB) per gallon of water for full stregnth.  In dry measure that is about 2/3 cup.  You can then dilute up to 4 to 1 with water depending on the job at hand.

  • What finishes will EFC-38 remove?

    EFC-38 works on removing oil-based finishes such as TWP, READY SEAL, WOLMAN, OLYMPIC, CUPRINOL and other semi-transparent finishes.

  • Is EFC-38 different than a percarbonate cleaner?

    EFC-38 contains a percarbonate, but is not like a straight percarbonate cleaner.  EFC-38 was designed to remove aged and failing oil based wood finishes.  It will perform many jobs that a percabonate cleaner can not do.  EFC-38 is safe to use and makes an excellent tool for wood restoration.

  • Can deck stain be applied with a roller?

    Yes. You can use a roller in order to apply a deck stain.

  • Can deck stain be sprayed on?

    You can easily spray the Deck Stain like Woodrich Brand Timber Oil when working on your project. A simple pump style garden sprayer works well. Almost any HVLP sprayer works well to spray deck stain. It is best to use a sprayer with a fan tip when applying deck stain.

  • Can deck stain freeze?

    Water-based deck stain will freeze. Thus, you need to always store it above freezing. Modified oil or water reduceable alkyd-based deck stains will freeze. While true oil-based deck stains will not freeze.

  • Will pressure washing remove deck stain?

    Pressure washing alone is not a good way to remove deck stain. If you use too much pressure trying to remove the stain you can damage your wood. It is best to use a deck cleaner or a deck stripper along with your pressure washer. Do this in order to safely remove the stain.

  • Will sanding remove deck stain?

    Sanding will remove deck stain. It is usually best to start with a rough paper like 80 grit. If there is a lot of stain on the deck it will require a lot of sand paper. When you are sanding to remove deck stain the paper will get loaded up quickly. You can find more information about SANDING A DECK here.

  • Will bleach remove deck stain?

    Bleach will not remove deck stain. Use a product specifically designed to remove deck stain. Bleach can be very damaging to wood. Bleach will permanently remove the natural color from your wood. This will leave your deck looking dull and lifeless.

  • Will deck stain peel?

    Some types of deck stain are prone to cracking and peeling. Deck stain that forms a surface film is the most prone to crack and peel issues. A penetrating oil based deck stain usually has the most resistance to cracking or peeling. Some products like Woodrich Brand Timber Oil will absolutely never crack or peel.

  • Will deck stain dry in cold weather?

    Most types of deck stain should only be applied when the outside tempriture is above 60 degrees F. Water based stain is generally more sensitive to cold weather. Some oil based stain will dry in cold weather. Woodrich Brand Timber Oil can be applied in very cold weather. For the best results it is always best to check the product manufactureres recommendations.

  • Will deck stain cover paint?

    Deck stain should not be applied in order to cover paint. It is designed to penetrate into the wood. If you want to apply a natural-looking deck stain, you will need to strip the paint first. Then you can apply the stain after.