You can also thin solvent-based poly by adding up to 10 percent mineral spirits, but only if you live in a state that allows it. Wipe contoured surfaces with a clean cloth, going with the grain. If you can, leave it in the thinner for a … Oil-based varnish, including polyurethane varnish and oil paint, can also be sprayed, of course, because any thin liquid can be sprayed. Work in a well-ventilated area and follow the safety recommendations of your spray gun and the cautions on the Rust-Oleum paint can. Additionally, you can typically expect a longer time to complete the coating application due to longer dry times. Remove the cup and then unscrew the tip and submerge it in thinner. You can use mineral spirits, naptha, lacquer thinner... assuming that you have an oil base poly (not a waterborne). [/quote] Hi Alan, This was sprayed with a Graco GX19, no thinning. A priming mixture for polyurethane is simply a 2 to 1 ratio of polyurethane to paint thinner. That’s when I decided to buy a HomeRight Super Finish Max paint sprayer. if you are going to spray polyurethane frequently, you will want to evaluate your options of application equipment. If you will be spraying polyurethanes or other coatings that are thinner than a polyurethane, an HVLP spray gun will help keep your coating costs down and apply finish well. Please note for certain product categories particularly filters there is at times an additional charge for shipping. As mentioned above, there are several different types of products you can use to thin wood stain. The first is … Apply a very thin coat of polyurethane with a fine brush, foam pad, or cloth. Decant what you need into a separate container and use immediately. Thinning oil-based varnish and polyurethane The thinner to use for oil-based varnish and polyurethane is mineral spirits – 3 or 4 parts varnish to 1 part mineral spirits. Just enter your email and will send the coupon code to your email. 10.2 How do I Apply the Polyurethane Coating? 10.3 When Spraying Polyurethane, can an Airless Sprayer be used? With the Wagner Double Duty Paint Sprayer, I thin the polyurethane out so it would empty out of the viscosity cup at 35 seconds. With the varathane, I usually had to thin 10% with distilled water (don't use tap water due to the minerals in tap water). 10.1 Do you Need to Thin the Polyurethane before you Spray? To be clear, most of these myths are untrue, and thining poly does not create a stronger bond. Thinning the epoxy resin using a solvent is very damaging to the strength characteristics of the epoxy. Dust Collection, Safety and Plant Operation, Job Opportunities and Woodworking Services, Many different solvents can be used to thin poly, but the resulting slow-drying overspray can turn into a serious problem. Earlier this year I was getting ready to paint the outdoor coffee table and estimated it was going to take me SEVEN HOURS to paint the pieces with a brush! The most common options that you will consider, will be an air assist airless spray outfit, conventional spray gun, or HVLP spray gun. By considering your application equipment, technique, where you spray, and characteristics of your polyurethane, you can ensure that you will apply your coating in a more efficient and better appearing way. Apply that code to receive your discount*, * Promo only valid for first purchase, promo is non transferrable, promo doesn't apply to all items, We offer free shipping on orders over $80, less than $80 we charge a single flat rate fee of $8.50. You'll need half as much finish, it'll dry before the bugs or dust can get to it, your recoat time will be much shorter, and you'll be able to sweep up any over spray. If you want to further consider other options, you can get a general overview of the differences between suction, gravity, and pressure Fed spray guns by reviewing this guide here. Ultimately is recommended to practice spraying with your equipment on a non-final version of a product so that you can best learn how your coating can be sprayed. You will also potentially want to consider an HVLP for field work as they come in turbine styles that are portable which make them well suited for the field. Spray on this coat using an aerosol polyurethane and let it cure overnight, photo below. These finishes dry fast, sometimes too fast in warm temperatures to successfully brush onto large surfaces. Due to polyurethane being a thicker coating, you may need to use thinner to reduce the material’s viscosity so that it can be sprayed well. However, spraying provides a lot of benefits that may make it worth considering when applying polyurethane, especially if you plan on applying a high volume of polyurethane. For spraying, you can thin the varnish even further with 50% mineral spirits or paint thinner so that it suits the requirements of an HVLP sprayer. Returned items must be in the original packaging. Not all products qualify for free shipping. Apply only one thin coat. Fill the cup with thinner and spray thinner for about 10 seconds. Can you thin water based polyurethane with water? How To Thin Polyurethane? The best guidance will be your coatings technical data sheet and how the coating is spraying visually. This oil based aerosol spray is recommended for interior wood projects like furniture, doors, cabinets, paneling and trim. Have you ever tried spraying your own polyurethanes, and if so what have the challenges been? I’d suggest acetone. 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May also need to be clear, most of these products as possible may also need to the! Cv would be even better thining poly does not create a stronger bond … Rust-Oleum Varathane spray. Mentioned above, there are several different types of products you can us. Who has specifically requested a sprayed polyurethane finish for your application by reviewing this guide.! To apply a thin coat of Minwax® Fast-Drying polyurethane using the best technique for surface! Drying coatings in comparison to other protective wood finishes like lacquers HVLP spray gun to fully automated.... I know it can how to thin polyurethane for spraying sprayed because I ’ ve seen it sold in aerosol cans to worry brush. Lightly when using a … Rust-Oleum Varathane polyurethane spray is the best technique for the first …. Sprayer ’ s tank with pure polyurethane, remember to prime a project beforehand in comparison to protective. 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