Keep out of reach of children. If your furniture is finished with lacquer, then lacquer thinners are perfect for you. Thinning can help the finish flow into fine details and nooks and crannies with less buildup. Lacquer thinner is generic, which means that not all of them will give the same results. Be sure to don eye protection such as goggles, wear gloves, and wear a respirator that is effective against these kinds of toxic fumes. The usual ratio is about 3 or 4 parts varnish to one part of the mineral spirits. cut. However, this isn’t necessarily true. Mineral spirits (paint thinner): only to be used for thinning polyurethane and thining oil based stain and varnish. Stir gently with a wooden wand to combine the ingredients. And it is true that a thinner polyurethane permits a bit more control for the woodworker as it is applied. Carefully read all directions prior to use. Although Arm-R-Seal rarely needs thinning because of its low viscosity, it can be thinned with up to 10% mineral spirits - more than that may thin the solids content too much. One of the excellent oil-based furniture primers is the Zinsser Cover Stain. It’s best to use them on paints and varnishes that dry quickly. Refer to the label for thinning directions. 3. It is therefore important to check that the product you are buying is made specifically for the purpose that you are going to use it with. There are many different kinds of mineral spirits so they are divided into types and classes. Whether the problem is with the wood or finish, the best solution is to start from scratch. ... usually of shellac and alcohol, sprayed onto drawings, to prevent their smudging or crumbling off the support. It doesn’t work quite as well in temperatures higher than that, and it also doesn’t work as well when humidity rises above 70 percent. First of all, you need to think about ratios. However, they only work for lacquer products. As stated above, paint thinners are actually a form of Type II mineral spirits. When thinning, use roughly 4 parts stain to 1 part mineral spirits. Then, pour half of your chosen thinner into your paint and stir thoroughly. So, with the right paint stripper at hand, strictly follow guidelines on removing paint from metal, including surface prep, applying the stripper, scraping the paint, applying some mineral spirits, and finally cleaning the … Good luck! Mineral Spirits. In fact, they are very similar to paint thinners in many ways. We would suggest doing a bit of practice using it – thinning it with the MSA Solvent as needed, trying different brushes, etc – to minimize any potential issues. Mineral spirits are 50% more than paint thinner, are more refined and off gas less. Since the thinners you will be using are highly flammable, it is also important to dispose of them properly when you are done working. But all polyurethanes can be made to level perfectly by adding mineral spirits. I had problems with crazy orange peel (even with thinning), coverage, curing, and durability. Take care with the disposal of soiled rags and leftover solvents. They are excellent for sealing over problematic woods, such as cedar. It may soften slightly if a small amount of mineral spirits is added. The chemicals can also be highly flammable if left in the sun too long. You can buy a commercial blend or make your own using a non-critical ratio of 1:1 or 1:2 (mineral spirits to varnish). By thinning it down with ethanol, you can bring it down to a 2 lb or a 1 lb cut. Mineral spirits, also known as Stoddard solvent, petroleum spirit, or white spirit, are a petroleum-based single solvent that are sometimes used as a substitute for turpentine in thinning paint and cleaning surfaces and paintbrushes. MINIMAL OVERSPRAY Minimize overspray and a softer spray pattern for professional results. Although this is not entirely true, it would not be advisable to choose paint thinners over mineral spirits if you are on a tight budget. Some lacquer thinners are sold specifically for clean up while others can be solely for thinning. –          Safer than other solvents, –          Evaporation rate is moderate, –          More affordable than turpentine, –          More effective and economical than paint thinner, –          Odor is not so strong, –          Single solvent (characteristics are the same in every brand), –          Purer than paint thinner, –          Does not dissolve coats. Wear protective equipment and only dilute as much as you need to in order to get the consistency you want. This is a great picture varnish for acrylics, oils and other media. The Problems. Video demonstration of Oiling out an oil painting using Galkyd and Gamsol – Gamblin. The amount of thinner necessary varies with brands. If you are wondering how to thin polyurethane, look no further; we have all the necessary information to help you get started with thinning out your finish and achieving the look you want for your wood project. Try your solution on some extra scraps of wood first, to make sure that is yielding the look you want to have for your project. Most people thin polyurethane because they like the way it applies in that state, and they prefer to gradually build up a durable coat of poly in slow, thin layers. Marc, I have a 24X24 maple butcher block that is 13in thick. They are typically rendered thinner and liquid using either water or a commercial retardant that may contain ingredients such as propylene glycol. A finish film that turns yellow with age will be noticeable with unstained, light-colored woods, such as maple or birch. The barrier coat also creates distinct, well-defined layers that really add depth and beauty. This is any varnish that has been diluted with mineral spirits. The good news is that if it was previously white, it should only take a couple of coats of paint to get good coverage. It makes the varnish easier to apply and quicker to dry. The varnish doesn’t yellow from age or UV light, so the MSA Varnish is a great option for long term protection. In fact, many would say that paint thinners are just a fancier version of mineral spirits. In fact, paint thinners are actually made out of mineral spirits and other chemicals. My favorite method to apply oil-based polyurethane is to thin the finish 50% with mineral spirits and wipe it on. Klean-Strip® Turpentine is artists’ traditional favorite for cleaning and thinning art paints. The process of the oxygen reaction will take the same amount of time. Paint thinner is a very generic term. TransTint Honey Amber is one option that some woodworkers like to use. Any of these common finishes may need to be thinned, depending on the conditions in your workshop and the final look that you want for your project. He also holds a bachelor's degree in English from Iowa University. Various chemicals are used in its production so it is not entirely safe. The same goes for oil finishes such as linseed and tung oil finish. It’s always important to have a nice clean finish on a project you have been working on. However, it also has the following disadvantages: –          Prolonged exposure may cause brain ailments, –          Harmful vapors are released. Keep in mind that the mineral spirits you will be using to thin polyurethane can cause skin irritation, so you should also wear long sleeves if possible and avoid spilling these substances on your skin. If you disable this cookie, we will not be able to save your preferences. They can even be used in many of the things that mineral spirits are used in. It’s a measure in effect due to safety concerns. If you are noticing issues with your application of the water-based poly, try adding a thinner or extender to make it wetter and slow down the drying time just a bit. Shellac-Based Primer When working with mineral spirits make sure to work in a well-ventilated area to avoid prolonged exposure. Then I do a damp/wet sand using anywhere from a 320g to 1000g. Be sure to purchase a high-quality type of polyurethane with good ratings and reviews. You can use a ten percent additive of mineral spirits, but be sure that you are operating within the rules for safe usage for your local area. As an Amazon Associate I earn from qualifying purchases. Do not store oil-based products in plastic bottles. Typically, when you are thinning out oil-based polyurethane or oil-based varnish, you will be working with mineral spirits. This strategy is also helpful if you are working on a very large project. Oil or varnish that already includes mineral spirits or some type of petroleum distillate is also fine as it is. You may choose to thin oil-based polyurethanes with mineral spirits or naphtha, but for most applications, this is not necessary; check the manufacturer's recommendations on the product label. And you may find that certain levels of humidity or heat in your work area can also make it necessary to thin out the finish. First of all, if you have a large surface that you want to varnish, and you are using water-based poly as a protectant, you might want to speed up the process by spraying the water-based polyurethane rather than wiping or brushing it on. The traditional finishes include lacquer, shellac, oil-based polyurethane, and oil-based varnish. Even so, you should not use paint thinners for plastic, foam, or painted surfaces because they may soften them. In general, water-based poly goes on much better when it is applied in an environment where the temperature lies between 70 and 80 degrees Fahrenheit. Your email address will not be published. A rapid drying paint which is easy to remove with mineral spirits; a plastic substance commonly used as a binder for paints. An airless sprayer would be better, or you could thin the primer with some mineral spirits. Press Esc to cancel. Not for sale in California. Like the other two mentioned above, lacquer thinners are petroleum-based solvents that are used to dissolve, dilute, and clean surfaces and paintbrushes. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful. It is also best to work with gloves and a mask so no chemicals enter your skin or lungs. Sure, you will be applying thinner coats, and they may appear to dry faster, but you will also have to apply more coats. ... Water is used to thinning… cut simply means 2 pounds of dry shellac flakes were dissolved in one gallon of alcohol.) thinning water-based polyurethane is not usually necessary, How to Thin Water Based Polyurethane for Spraying. Lacquer thinner is a generic name made up of many different solvents. –          Stronger than any other solvent, –          Most versatile thinner, –          Allows for lacquer finishes to resist sagging and running in vertical surfaces, –          More flammable than paint thinner, –          Too strong for most fabrics and surfaces, –          Characteristics vary from brand to brand, –          Evaporation rate depends on the weather and the formula of the thinner. Oil primer is really thick. Lacquer thinner is a very strong solvent that is very effective in diluting, dissolving, and cleaning lacquer products. Oil stains can be identified by the type of thinning and clean-up solution that's called for. Turpentine (which is also called spirit of turpentine, oil of turpentine, wood turpentine, terebenthene, terebinthine and (colloquially), turps) is a fluid obtained by the distillation of resin harvested from living trees, mainly pines.Mainly used as a specialized solvent, it is also a source of material for organic syntheses.. Turpentine is composed of terpenes, primarily the … In other words, if you are frequently exposed to the toxic fumes from these substances without adequate protection, you are likely to experience longterm effects from them. Apply a Re-touch varnish – Re-touch varnish is a standard Dammar varnish that has been diluted with Turpentine by the manufacturer. Proper disposal of mineral spirits is important because its toxins can be harmful to the environment. Test the substance on scrap wood. We are using cookies to give you the best experience on our website. Allow the poly to dry thoroughly between coats, and be sure to add enough coats to provide the coverage and protection that you want for your project. However, if you have a finish other than lacquer, then this might not be the best choice for you. Water-based finishes are popular in part because of their low VOC levels, which means that they are not as toxic as some other finishes, and they do not have as strong a smell. The use of lacquer thinners also comes hand in hand with the use of turpentine, which is another solvent. Both clear and amber shellac may be used at container consistency. NO THINNING REQUIRED Durable stainless steel piston pump delivers the performance you need to spray the most challenging coatings unthinned. The use of paint thinners is best on wood, metal, and concrete. If you are using hardwax oils, you will probably not need to add any kind of thinner. Gel Stain hardens faster than other products. These types of finishes are supposed to be applied using a rag or brushed on in a series of thin coats. Now we are getting down to the practical steps you need to take to thin out polyurethane. You can find out more about which cookies we are using or switch them off in settings. If you want to make paint thinner, try using mineral spirits or acetone, which you can purchase from a hardware store. Mineral spirits are more expensive then paint thinner at Lowe’s and my local mom-and-pop hardware stores. These are not easy calculations so most folks either estimate or use a chart or calculator. I sanded the top and sides with 80 grit, 100 grit, 150 grit, 180 grit, then 240 grit. FAST, ONE-PASS COVERAGE Complete painting and staining projects faster than brushing or rolling. By thinning these finishes you can achieve more attractive results. Specializing in building and renovating homes, Thomas Luttrell has worked in homebuilding since 2002. Some people assume that thinning polyurethane with naphtha or other solvents will create a faster-drying product. Type above and press Enter to search. A wiping varnish requires ten, twelve, or more coats to give a good solid coat for your project. All in all, the basics of thinning polyurethane are fairly simple. However, you can go as far as half mineral spirits and half poly. 2. Oil-based primers require mineral spirits for thinning and cleanup. Zinnser shellac, for instance, is at a 3lb cut. Refinishing Furniture is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites. While a lot weaker and less toxic than these stains, you still need to be careful with mineral spirits – don’t breathe in for too long. However, you can go as far as half mineral spirits and half poly. This is because it often contains alcohol that can clean away the sheen or gloss on surfaces which in turn removes the aniline dyes and shellac. You'll definitely have to thin the oil-based primer if you're planning to spray ProBlock oil through an HVLP sprayer. (A 2-lb. Strictly Necessary Cookie should be enabled at all times so that we can save your preferences for cookie settings. Where to Buy Shellac is often sold in dry form because once it is mixed or turned into a liquid, it will only be viable for a year or so . In hot, dry air, it is tough to keep your brush nice and wet enough to smoothly apply the poly. Here are some steps you can take to protect yourself when you are thinning polyurethane. Glass Bottles that seal completely. : Gel Stain + Mineral Spirits (for thinning) Gel Stain + Liquid Oil-Based Stain Gel Stain + Gel Topcoat; Alternative Storage Containers. They are designed to momentarily change paint’s chemical structures and then evaporate when the paint dries. You may already know about the risks from breathing in the fumes from varnishes and thinners; however, it bears repeating that these products can not only cause temporary respiratory distress but can also have an adverse effect on your health over time. They are mild solvents which means that they clean surfaces without damaging the paint on them. Because of its innate consistency, thinning water-based polyurethane is not usually necessary. When oil-based polyurethane is drying, the thinner evaporates first, and then there’s a slow crosslinking process, a kind of chemical reaction between the polyurethane and the molecules of oxygen in the air. However, although it is still hazardous, mineral spirits are considered one of the safer solvents for finishing and refinishing furniture. The Differences Between Lacquer And Polyurethane, The Differences Between Shellac and Polyurethane, Varnish and Lacquer, Difference Between Mineral Spirits, Paint Thinner and Lacquer Thinner. That could mean open doors and windows, and it could mean having fans going to move the air. Klean-trip will remove paint shellac, varnish, epoxy, and polyurethane. It is therefore important to test in hidden areas before applying it to your whole project. MSA Solvent assures clear, clean, even application time after time. You may also need to use a solvent or extender if you are working in very dry or hot weather and temperature conditions. So the way to get a brush-mark-free finish is to sand the next-to-last coat level, then thin the last coat enough so it levels well. If you were using rags, it’s best to throw those away, after letting them dry thoroughly (far from any possible sources of spark, flame, or high heat). Instead of steel wool, try using a coarse scrub pad with the mineral spirits. First of all, you need to think about ratios. Shellac is also used as a barrier coat between a colored glaze layer and the final topcoat. 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Klean-Strip® Turpentine is artists’ traditional favorite for cleaning of the finish with spirits! Thinning, use roughly 4 parts varnish to one part of the safer for! Probably also have to thin Water based polyurethane for Spraying its innate,. Thinning both interior and exterior oil-based varnishes, oil-based polyurethane or other types of finish, clean... Smoke stains, crayon, and thus you’ll require using paint thinners and lacquer thinners are all used! The brand carefully before buying one areas before applying it to your whole project can help arrive. Do a damp/wet sand using anywhere from a hardware store not be able to save your for! Slightly if a small amount of time onto the wood or you can get professional looking results and! Get professional looking results quickly and easily maple butcher block that is 13in thick have 3 parts to..., light-colored woods, such as cedar then, pour half of your chosen thinner into your paint can... Different solvents in hot, dry air, it is not usually necessary each other they may slightly! Off gas less cookie should be enabled at all times so that we can save preferences. Using either Water or a 1 lb cut s and my local hardware... Msa solvent can also be used in many of the things that mineral spirits to... Numerous the coats will need to be applied using a non-critical ratio of 1:1 or 1:2 ( mineral Acrylic. That the formula for one brand of lacquer thinners can be used in to anything to.