Polyurethane coatings are mostly used as top coats over Epoxy coatings. Last seen: 5 months 11 hours ago . They cannot be used as a complete system in itself. Yes. Many brands and types of marine paints are available which are suitable for roller or brush application by the amateur. Part 1 of a tutorial showing a modern take on an old maritime tradition; varnishing. By utilizing epoxy and polyurethane together, you’ll optimize your industrial and commercial floors to the maximum. Polyurethane over epoxy garage floor. Polyurethane is a polymer material that has urethane linkages. The benefits of varnish over epoxy. I never knew you weren’t supposed to put the wax over the poly. EPOXY.COM PRODUCT #442 polyurethane provides a gloss finish. However, there is one thing that you need to have at the back of your mind before doing so. Joined: 01/27/2006 . Two-part clear polyurethanes are known for superior UV resistance and scratch resistance compared to traditional varnishes, but they have shown mixed results when applied directly to wood. Note on Creating Texture: Non-Skid Additive (80/100 mesh or 20/30 mesh) or White Aluminum Oxide (80 mesh or 240 mesh) may be blended with the epoxy, Polyurethane, Polyaspartic or Acrylic resin used for the final topcoat to create a … I've made one board with epoxy lam and a polyester hot coat. After 72 hours of applying the Danish Oil, any oil based polyurethane can be applied.”-- Respectfully, Paul Product #442 has good chemical, stain, and mar resistance. Epoxy vs Polyurethane. Then you want to sand the epoxy and install a coat of polyurethane coating as a protective wear surface over top of the epoxy coating. Epoxy vs Polyurethane: Epoxy or epoxy resin is a class of polymer material that consists of epoxy functional groups. Like epoxy, polyurethane is a thermosetting polymer and high-performance coating. You don't want to put any kind of polyurethane on the wood if you intend to use an epoxy finish. Epoxy is best used as a repair, patch and build coat to hide imperfections in the concrete. If you wished to seal the wood you could use a coat of Zinsser Sealcoat. Polyurethane Floor Coating. I’ve read multiple places and they say the poly won’t dry if you put it over the wax. The types of labs where Epoxy resin countertops are popular are pharmaceutical, educational, hospitals, medical, R&D labs, microbiology, biomedical, biological science labs, molecular pathology, and industrial testing. Epoxy is an excellent adhesive to use for concrete surfaces. Though polyurethane has many advantages over epoxy, it does not bond well to concrete and its thin dry film thickness will not work well as a self-leveling coating to fill in small cracks in the surface. Linear polyurethane (LP) systems can usually be applied directly over epoxy coated surfaces without primers, but they are costly and frequently have much more critical application parameters. Use a green kitchen scrubby or 220 grit sandpaper on the poly then pour the epoxy. Yes, but you need to first apply 2 or 3 coats of Epoxy Resin and then you can apply one clear coat of 2-Part Polyurethane finish. Durability and strength are why epoxy works so well against heavy tire pickup, wear and tear, and scratching. Grease stains, dirt, dried mud, and any sort of other filth needs to be washed off before you can apply the first coat of polyurethane. The clean transparent sheen of polyurethane finishes is the stuff of legends this is how to ensure that your project looks a million bucks. In addition, it’s easy to clean The epoxy finish will bond to it. Chemical Resistance Polyurethane boasts unrivalled resistance to But it is also known as the high-performance floor coating. Epoxy has it’s place in certain commercial environments, but when you are needing a tough and flexible coating to protect from large abrasions and industrial wear and tear your best choice is Hybrid Polyurethane. Another consideration is that most polyurethanes are solvent based, … This type of finish or coating is beautiful as well as long-lasting. The epoxy just won't adhere to it. I'm not sure what you mean about the epoxy running down. It would be best to roughen the poly with some 100x sandpaper prior to applying the epoxy. Part 3 – Application epoxy, polyurethane, polyaspartic, acrylic coatings. Before applying gelcoat over epoxy: surface preparation steps. Last post. Polyurethane flooring is a thermosetting high-performance polymer much like epoxy, but it’s often used as a top coat over epoxy. Epoxy creates a hard protective coating that bonds to concrete or steel. When you need to repair a crack in a foundation or wall from the inside (negative side) of the structure there are two injection techniques and product groups that you need to consider — epoxy resin injection and polyurethane chemical grout injection. They are not used alone because they do not typically bond well to concrete, and it has a thin film thickness that does not work effectively in self-leveling. However, I looked about on the internet this evening and located a product—EX-74—that may be UV stable. This chemical protects against damage, UV rays, and water. Polyurethane delivers a tough and flexible coating to wood. Hi guys ive been epoxy coating my navigator hull in preparation for painting. There are water-based polyurethanes not suitable for application over lacquer or shellac. ( MCU-100 , MCU-101 , MCU-104 ) – Acrylic Polyurethanes: Acrylic Polyurethanes are known for their excellent gloss and color retention, UV resistance, and provides a tough and durable finish. We recommend MinWax® brand stains when applying our epoxy coatings over a stain. Can you Remove Polyurethane by Using Vinegar? Use a soft sponge or rag and a powerful detergent to clean up the painted surface. Epoxy Benefits. It’s not as strong as epoxy but there are some occasions when it might do a better job. If the wood grain is visible, brush in the direction of the grain. Polyurethane is like epoxy in that it is also a thermosetting polymer. If you're applying polyurethane to a painted floor, you can also use a floor finish applicator, which is a pad or weighted tube that you drag over … I sanded the epoxy surface with 400-grit wet/dry, and then applied a water-based polyurethane.However, I can see scratch lines on the epoxy from the wet/dry paper through the polyurethane finish. In short; you CAN apply a lacquer or a polyurethane over a Danish oil. Polyurethane inherently has adhesion problems even to itself. Thus, the desire for a UV stable water-based polyurethane over the epoxy. Polyurethane. #442 is also available in an ESD formulation which must be applied over a base coat of Epoxy.com Conductive Epoxy. Hybrid Polyurethane. Though the epoxy levels of its own accord, the surface isn't perfectly even. polyurethane over epoxy. Polyurethane floors are generally softer and more elastic compared to the epoxy, giving them better resistance to scratching – ideal for spaces like multi-deck car parks, which experience high levels of foot traffic. However, I have done multiple pieces of furniture and have done the antiquing with the dark wax and then done the poly over to finish the pieces and have never had a problem. Fri, 2009-10-09 17:47 #12. tonybanger. About Polyurethane Floor Coatings. I’ve emailed the manufacturer—TAP Plastics—to determine 1) if the product is UV … So, to properly apply polyurethane over paint: Step 1: Wash the surface. You can apply polyurethane over any paint, as long as the surface is clean and prepared well to receive the polyurethane coat. Epoxy is poured over different substrates. No reason why you can't. Polyurethane is another resin for floor coating concrete and steel. Implicit of its name, polyurethane is plastic and can be solvent (oil) or water (acrylic) based. In fact, some manufacturer’s claim that the wear resistance of polyurethane over epoxy is almost 3 to 1. Trying to find the best epoxy coating for your garage floor and your budget can be difficult. If you choose to brush the polyurethane, choose a direction and keep brushing in that direction. Can Polyurethane be Applied over Resin? Humidity resistance. You don't want the epoxy on the edges of the top as well? Advantages of Polyurethane Over Epoxy in Brewery Production Areas Two of the most common are polyurethane and epoxy resin, both of which have various pros and cons and as such a strong case can be made for both types of flooring systems in a brewhouse production area. Overall, the qualities of the polyurethane system outweigh those of a roller-applied epoxy coating. 24 posts / 0 new . Just as you can over any Drying Oil. Home » Forum » General Discussion. The other general class of oils are Non Drying Oils. “Thank you for your recent e-mail. This article explains on how to install an epoxy coating on the floor in your garage. Most MCU’s are aromatic, which basically means they can change color over a period of time. This doesn’t mean that it’s more expensive over time, however, in fact, epoxy needs renewing far more often and polyurethane is better value for money over long time periods but the setup cost is much higher and this can be a real problem on big projects. Epoxy and Polyurethane Resins are the Superheroes of Concrete Crack Repair. Epoxy with two-part polyurethane varnish Two to three coats of epoxy also provide a stable base for clear two-part polyurethane finishes. Epoxy’s extremely hard surface allows it to be impact resistant. The upsides of using polyurethane are: Superb look. Click to see full answer Thereof, can you put water based polyurethane over epoxy resin? It would make a better bond. It would be better if the epoxy were used on bare wood however it should work over the polyurethane. My surface finish is very good. This should make sense, because once dried, the oil has cured to a hard solid film surface, and stuff will now stick to it. Pros/Cons of Applying Water Based Polyurethane Over Oil Based. Applying one or two coats of polyurethane over paint would be a great move more than that would be futile. The key to success is to make sure the oil has fully dried first. ... Epoxy with two-part polyurethane varnish. Polyurethane Coatings. You are here. The only clear coat that can be applied over the Danish Oil is an oil based polyurethane. It protects the paint from peeling and is easy to clean. A polyurethane (PU) product is a coating system which results from the chemical reaction between a polyol resin (also known as the base, or the “Part A”) and a poly-isocyanate curing agent (also known as the hardener, or the “Part B”). Before coating a fully cured layer of epoxy with polyester gelcoat, prepare the surface properly to remove any amine blush. Applied over epoxy, they perform beautifully together and outlast either coating used by itself. Allow the epoxy to cure to the point where sanding produces a fine powder. There are no significant advantages or disadvantages of applying water-based polyurethane over oil-based. They also tend to develop cracks due to expansion/contraction of the wood. They offer chemical resistance and waterproofing. Monomers: The monomers for epoxy resins are phenols and epichlorohydrin, but the monomers may vary depending on the type of epoxy resin. Wash away amine blush with water and an abrasive pad such as a 3M #7447 Hand Pad.