Some still insist that durability is the main deciding factor between water based & oil based polyurethane. Yes! The beauty of all our water-based sealers and topcoats is that they’ll level and adhere to whatever solvent- or oil-based stain you’ve used. Spray lacquer is commonly used on new furniture and in new construction. Water-based polyurethanes dry much faster. On the downside, water-based poly tends to raise the grain of the wood, is susceptible to watermarks, and can be temperamental when applied over some wood stains. OTHER TIPS: - Oil based finishes amber over time. Now, there are several benefits to water based polyurethane and in some circumstances, water based poly is a great option. I'd like to use a water-based polyurethane over a staircase I stained last night with a Sherwin Williams oil-based stain to avoid yellowing. Initially, it’s hard to tell the difference between the two; however, with time, the oil-based one will begin to exhibit an amber hue that darkens over time. As with shellac, the water-based polyurethane does not hold up well to heat plus chemicals. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. And actually, the answer is YES—you can use our EMTECH water-based sealer or top coat over the oil stain. Can I apply water-based polyurethane over an oil based stain? Can you apply water-based polyurethane over oil-based? Price. Nope – the same process works with pieces of wood or wood furniture. There’s an ongoing debate over which is more durable & long lasting. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. it is possible to do just that under certain conditions.. Yes! When it's smooth, it's ready for stain, and there are two types commonly used, oil-based and water-based. Did Proto-Indo-European put the adjective before or behind the noun? That's why you should always apply a barrier coat of dewaxed shellac to seal oil-based stain. A great finish to try is ZAR brand ULTRA Max – a waterborne oil modified polyurethane. If you want to put a water-borne poly over an oil stain, in most cases you can. Recoating a water-based acrylic floor finish with oil-based polyurethane is not usually a problem, so long as the old finish is properly buffed and cleaned before applying the new finish. The water-based material is more expensive, so often you will pay around 10-25% more. You can apply water-based polyurethane over oil-based as long as you set suitable conditions for this to happen effectively. That’s a vital feature that you must have if you have some kind of breathing issues. This is because the curing process for oil is polymerisation, and polymerised oil is akin to resin. If you are wiping or brushing on the water base over the oil stain, a sprayed on sealer or shellac will lock in the stain, before the brushed or wiped on WB coating. Oil based used to be unquestionably more durable. So far so good, but am I likely to have problems with poly adhesion in the future because I mismatched the base types of the stain and poly? Can I apply polyurethane over oil before oil cures? Another disadvantage of using water-based polyurethane over oil-based is the cost. Oil-based polyurethane can withstand extreme temperatures which makes it a good choice for exterior surfaces and furniture. The stain was color matched to our new hickory floors, which are stained a medium-dark true brown (no yellow). There are water-based polyurethanes not suitable for application over lacquer or shellac. Woodworking Stack Exchange is a question and answer site for professional and amateur woodworkers. Please use the following guidelines: To ensure the color fastness of Minwax Wood Finish prior to applying Minwax Water-Based Polyurethane: 1.) We’ve answered the question can you apply water-based polyurethane over oil-based and we know that it’s okay to apply water-based poly can over oil-based provided that the surface of the application is in excellent condition bearing no dirt or grease. Water-based polyurethanes don't match well with oil-based stains, so if you're applying over stain you'll want to "rough up" the stained surface slightly before applying your water-based polyurethane, using some synthetic steel wool. Oil-based Polyurethane. You can also use. Flooring wholesalers and veteran floor finishers agree that you can recoat water-based poly with oil-based as long as the original coating has completely cured—generally 30 to 60 days. BUT always test it first using a scrap of wood. The question is. Just ruined an entire set of shelves I built because I followed this advice. 3. The mineral spirits will remove All of this is exactly as per instructions on products. Stain highlights grain patterns. SUBJECT: Minwax Water Based Polyurethane Over Minwax Wood Finish Stains You may apply the Minwax Water Based Polyurethane over a fully cured Minwax Wood Finish Stain (oil-based). Water-based polyurethane is technically a misnomer since polyurethanes are an oil-based product. the mineral spirits will not affect the color. Minwax PolyShades is an oil based one-step stain and polyurethane finish that provides wood stain color and durable polyurethane protection. It can be applied over oil-based stains like Minwax® Wood Finish™ or Minwax® Gel Stain. You can do the application using a sprayer or even a lint-free cotton clothing. We'll help you decide. If this is your first visit, be sure to check out the FAQ by clicking the link above. This color difference is less noticeable over a stained hardwood floor, but an oil based poly will still exhibit an amber hue that will continue to darken over time. You may have to register … Water-based poly can have adhesion problems when applied over an oil-based stain that's not thoroughly cured. rev 2021.1.8.38287, The best answers are voted up and rise to the top, Woodworking Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. It can be applied over oil-based stains like Minwax® Wood Finish™ or Minwax® Gel Stain. A lot depends on the wood, the weather and how long you left it on before wiping it off. When using an oil based topcoat over a water based stain or milk paint, allow water based finishes, such as HP topcoat to dry at least 24 hours before coating with an oil based product. There are as many different formulas for stain and water borne polys as their are such existing. You can also use mineral spirits. Oil-based polyurethane takes about 24 hours to dry while water-based one takes only 5-6 hours curing time. Short answer: yes. Find out which finish is best for your project, water-based or oil-based polyurethane. So there’s no need to go oil on oil simply because your stain is oil-based. Both are durable and good-looking, but there are differences. Is there a different process for sealing stained wood furniture? It only takes a minute to sign up. Oil-based polyurethane is much higher in VOCs so it has a strong odor and is not environmentally friendly whereas water-based polyurethane is a low VOC product with little to no smell. The odor and possible health effects of using a high VOC product should always be considered, but especially if you’re refinishing hardwood floors in the winter when you can’t air the house out well. Water-based polyurethane is the most popular because it contains low odor and a small number of toxins. Oil-based polyurethanes leave an amber glow and require fewer coats. Also, the slow drying makes it possible to wipe off any excess stain for an excellent finish. I was just wondering, if I don't want to apply a second coat of stain, do I really need to wait 8 hours to apply polyurethene over top of the stain? And if you’re holding a can in your hand wondering if it’s oil based vs water based stain, then you’re not alone. Wiped stain thoroughly, waited 60 hours before attempting to apply Minwax water based, oil-modified polyurethane, using synthetic bristle brush. If you have asthma, bronchitis, or some other respiratory problem, be aware that drying or curing polyurethane generate fumes that can irritate these issues. The oil-based and the water-based one. Usually, you will find water-based polyurethane almost twice as expensive as the oil-based one. Where can I use Water Based Oil-Modified Polyurethane? Afterwards I applied a water based matte poly, because I didn't want any yellow tint to show on the light gray color (see this question). However, there is one thing that you need to have at the back of your mind before doing so. Penetrate deeper. Both water based and oil based poly offer good protection; the biggest difference is in appearance. It goes on and dries clear without adding a slight color, unlike the oil-based versions. Advantages of water based polyurethane: 1. If the linseed oil is allowed to dry completely there isn't a need for a barrier coat. The products that have made Minwax® an American icon will add color and beauty to your wood—in oil or water-based stains. Water Based Oil-Modified Polyurethane is ideal for use on all interior bare or stained wood surfaces including furniture, cabinets, doors and floors. The beauty of all our water-based sealers and topcoats is that they’ll level and adhere to whatever solvent- or oil-based stain you’ve used. A lot depends on the wood, the weather and how long you left it on before wiping it off. Both water and oil-based polyurethane do their jobs so well and even share some similarities. To learn more, see our tips on writing great answers. A 120 grit sandpaper does a great job of roughening. But if you didn't experience major problems with beading of the waterbased poly as you were applying it I think you're OK. But harder wood furniture based wood conditioner help keep ink from bleeding on wood have! 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