Resin and epoxy are both adhesives commonly employed in the construction industry. These co-reactants are often referred to as hardeners or curatives, and the cross-linking reaction is commonly referred to as curing. Epoxy resins can react with each other via catalytic homopolymerization and form cross-links between them. Even if some of the other more expensive materials can be compared with resin in terms of longevity and quality, the cost-effectiveness, as well as its water-permeable nature, simply makes resin the more practical choice. Polyester laminating resin doesn't fully cure while exposed to air, so when it is used for lay-up, every application joins to the previous one on a molecular level. “It’s bare concrete and we need it to be durable, bright, safe and easy to clean. However, using an epoxy-based resin will ensure that the product cures hard and bonds securely to the surface. Resin vs Epoxy: below is a list of these main resin categories: Polyester Resin: This is not an actual epoxy but is rather an unsaturated synthetic resin; Epoxy Resin: This type is supplied in 1 or 2 component forms; Polyurethane Resin: This is also not an actual epoxy but is rather a synthetic resin or plastic Learn the differences between epoxy vs polyurethane coatings. Available here, 1.’Epoxy’ By Dzhang2680 – Own work, (CC BY-SA 3.0) via Commons Wikimedia Epoxy vs. Polyurethane vs. Resin vs. Urethane Cement Flooring. As a result, this can be made very variable to suit any application. (adsbygoogle = window.adsbygoogle || []).push({}); Copyright © 2010-2018 Difference Between. Like epoxy, polyurethane also comes in different formulations. Here we use bisphenol F in the place of bisphenol A, but the way of formation of the polymer is same as the bisphenol A epoxy resin (as discussed above). With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. It is a form of polyurethane. The crosslinking process forms a thermosetting polymer that has favorable chemical and mechanical properties. The monomers for epoxy resins are phenols and epichlorohydrin, but the monomers may vary depending on the type of epoxy resin. In fact, in many cases, if the epoxy primer and build coats are well-bonded, a simple re-coat of the polyurethane topcoat may be all that is required every few years, depending upon use. Polyurethane vs Rubber. With so many options available, it's difficult to decide what's best for your facility. Chemical-Resistance: Polyurethanes are resistant to a broader range and concentrations of chemicals. The ratio between the number of epoxy groups and the mass of the polymer material gives the specific amount of epoxide groups in an epoxy resin. Urethane is composed of organic, or carbon-based, links that react with a … • Epoxy is stronger than resin. These epoxies are designed by having the curing agent with a small amount of epoxy resin. They also harden differently. From a form and function standpoint, epoxies are very good at three things: On the other side of the coin, epoxies are sensitive to UV light so they will amber or yellow over time when exposed to sunlight. A particular draw of using PU foam is that it is closed cell—meaning it won’t easily soak up resin or water (should you ding your board), which helps keep the board light. It all depends on what your project is as to whether you would choose epoxy resin or polyester resin.
December 3, 2019 weezypops Blog. This polymer material is linear and is semi-solid crystalline materials.
Polyurethane resin, on the other hand, is up to 50 times more expansive than epoxy resin, making it far more resistant to cracking and therefore suitable for indoor or outdoor use. Novolac is another class of epoxy resin that has higher functionality than standard DGEBA resulting in a higher crosslink density. One of our all-time most popular posts on Allthingsflooring.com is “Epoxy vs Polyurethane – which will you choose”.As this has proved to be such an in-demand topic, we thought we’d follow up with a post that looks into these two resin chemistries in a bit more depth. Epoxy. This makes polyurethane coatings more resistant to scratches and similar damage and is why you’ll often find urethane resin floors in heavy traffic areas – such as multi-storey car parks. An epoxy laminate will need less resin and less material, for the same strength and stiffness joint than polyester, so you save in goo and materials, offsetting to a degree the price difference for the resin. Prior to that, Sean worked in the construction industry, specializing in contract and project management for commercial and industrial floor and roof projects. Résine époxy VS Polyuréthane : avantages et inconvénients. PU/PE are built using a polyurethane foam blank and then glassing it with a polyester resin. Moreover, polyol also should have at least two hydroxyl groups per molecule. Epoxy injection is performed through surface mounted ports. Polyurethane is generally more resistant to scratching, chemicals, UV rays, and general wear and tear than epoxy. He has over 15 years of marketing and sales support experience in the protective coatings industry. Polyurethane will not bond as wide a range of materials as epoxy resin will but in the case of fiber, wood, leather, etc. If the repair is critical or structural, an epoxy resin should be considered. Available here Epoxy is a blend of hardener and resin made from polyamine and epoxide. Build/Thickness: Epoxy build coats are typically installed at 8 to 15 mils per application. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. Polyester and polyurethane resins are the most commonly used casting material available. 5 days for base and 8-12 hours for overcoats undercuts epoxy cure times but disrupts the use of your space significantly. As a varnish style coating. Epoxy resin is made through curing, or using heat, air, or chemicals to harden the substance.
Which coating would you recommend?”. Cons • There are, some particular usage method of epoxy resin, it can be highly dangerous if not used correctly. 5. 7875 Bliss ParkwayNorth Ridgeville, Ohio 44039, info@protectpoly.comWe reply within 24 hours, Sean Walsh is the Marketing & Product Development Manager of Protective Industrial Polymers, a company that manufactures high-performance resinous floor coatings for industrial manufacturing environments, which has a keen focus on developing unique solutions for managing electrostatic, microbial, chemical, explosion and safety risk concerns. 2. A lighter board is easier to carry, easier to paddle, and will often feel faster when riding them along the face of the wave. • Epoxy is resistant to water, heat, and chemicals whereas resins are not. There are similarities between these substances, but their differences are more apparent and each industry seems to have its own preference. Difference Between Copolymer and Homopolymer, Difference Between Polystyrene and Polypropylene, Side by Side Comparison – Epoxy vs Polyurethane in Tabular Form, Difference Between Coronavirus and Cold Symptoms, Difference Between Coronavirus and Influenza, Difference Between Coronavirus and Covid 19, Difference Between Oleic Acid and Elaidic Acid, Difference Between Apple A7 and A8 Processors, Difference Between Microarray and RNA Sequencing, Difference Between Filgrastim and Lenograstim, Difference Between Parallel and Antiparallel Beta Pleated Sheets, Difference Between Sodium Citrate and Citric Acid, Difference Between Hypersil and Inertsil Column, Difference Between Trypanosoma Cruzi and Trypanosoma Rangeli. We recommend concrete preparation by mechanical means, such as diamond grinding or abrasive shot blasting methods. • Epoxy resin forms stronger bonds when it comes to gluing two pieces together and has better adhesive properties with surfaces like wood, metal or concrete. The upsides of using polyurethane are: Superb look. PU casting resins can, just like epoxy resin and polyester resin, be combined with various additives as well as filling materials or colorants. Epoxy carries protections for impact, scratches, water, and chemicals. Video of the Day Volume 0% Polyurethane coatings perform very similar to Polyaspartics but they take longer time to cure (at least 24 hours) and need to be applied very thin (4 to 6 mils per coat) Polyurethane coatings are used mostly top coats over Epoxy coatings. In this guide, we’ll compare epoxy resin and polyurethane resin: keep reading to learn more. Aside from the elastic durability factor which makes polyurethane the number one choice by default, the resin is also more scratch-resistant, crack-resistant, temperature resistant and chemical resistant than epoxy. The blending of the 2 components for each resin type creates a material with the requisite properties for professional crack injection repairs. “Polyurethanes.” The Essential Chemical Industry Online. An old EPS blank can be broken down and recycled into a new blank.
Epoxy vs polyurethane is a common topic brought up during my conversations. Epoxy adheres to wood much better than polyester does. Both epoxy and polyurethane are polymer materials. Epoxy is an organic compound. The unit for this measurement is “mol/kg”. There are certainly different types of epoxy coatings formulated to address a different desired performance result. Polyester is far less pleasant to work with than epoxy. Resin coatings, such as epoxy or polyurethane, help make flooring materials meet the needs of various industries. There are a number of different epoxy floor coatings on the market today, with costs that are all over the map. They cannot be used as a complete system in itself. • Damaging or getting a crack on it is almost impossible, this is because of the high durability of epoxy resin. If we increase the amount of bisphenol A (compared to epichlorohydrin), it provides high molecular weight polymer material. All rights reserved. Epoxy boards also tend to be a better option for beginners as they are lighter, float better, and are more difficult to ding. it creates a perfectly serviceable bond and one which is likely to be clear in appearance as well as strong. Installation & Performance: Upon curing, the epoxy build coat(s) provide a hard, durable surface with good impact resistance. Side by Side Comparison – Epoxy vs Polyurethane in Tabular Form We frequently get asked about the difference between epoxy resin and polyester resin. Novolac epoxy resins for high temperatures. 1. What is Epoxy? Epoxy creates a hard protective coating that bonds to concrete or steel. As polyurethane is more durable than rubber, it can be used in cases of high stress and offers a certain amount of flexibility but remains strong. Epoxy is made from epoxide and polyamine as a resin and hardener blend. Epoxy resins can resist moderate temperatures. Polyurethane is another resin for floor coating concrete and steel. For example, parts made for bumpers, spoilers, and fenders. 3. Increased Impact and Abrasion Resistance: Polyurethanes exhibit excellent impact and abrasion resistance, providing up to four times longer life than uncoated epoxy floors. Often, people say “resin” without specifying which resin. Epoxy vs Resin. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. Epoxy resins less flexible and less abrasion resistant. These epoxies are designed by having the curing agent with a small amount of epoxy resin. Polyurethane (or urethane), used for foundation crack repair applications, while not necessarily a 2 component blend, can have 2 components; the polyurethane resin and an activator, or accelerator. In the industrial floor coating world, while epoxies and polyurethanes are both thermosetting polymers, their differences in function and performance are vast. The difference between epoxy and polyurethane is that the epoxy resin contains epoxide groups whereas polyurethanes contain urethane linkages. @Linda, I would use a very hard curing epoxy or even a polyurethane resin. Epoxy Vs. Polyurethane: Which is the Best Resin for Your Driveway? The epoxy resin is less toxic to the board builder and the environment. The latter has very good abrasion resistance, but it did not resist point loading as well as the carbon fiber/epoxy laminates. It is formed when isocyanates react with water or polyetheramines to create a urea linkage. It can be overwhelming at first. • The next use of Epoxy is in the production purpose of various electronic things such as insulators, generators, transformers, etc.
Therefore, the cross-linking reactions that epoxy resins undergo with these curatives refers to “curing”. It takes an age to dry. This polymer material has a low viscosity at room temperature. It resembles plastic with more durability. That being said, there might be a few dilemmas and … It’s not as strong as epoxy but there are some occasions when it might do a better job. For concrete floor coating applications, the most durable, longest-lasting coating systems usually include the use of both epoxy and polyurethane. A polymer is a macromolecule that contains a large number of small repeating units (monomers). Epoxy and polyurethane are great for protecting your floor against stains, damage, chemicals, oils, and wear. Chemically, both epoxy and urethane are polymers, or large molecules that contain a repeating structure. • Resins are used more in construction where there is no hurry for the final product. In summary – Epoxy vs Polyurethane. In the application point of view, the main difference between epoxy and polyurethane is that the epoxy resins can resist moderate temperatures while the polyurethanes can withstand high temperatures. “What’s the difference with epoxy vs polyurethane coatings?” In the industrial floor coating world, while epoxies and polyurethanes are both thermosetting polymers, their differences in function and performance are vast. Epoxy resin countertops are a mixture of resin, silica, a hardener, and filler, which are molded and oven cured as a solid slab. Not sure what type of polymer floor coating system your facility requires? With 98% solids, polyurea is 4x stronger and yet 98% more flexible than epoxy. Flexible and elastic properties go to both of these options and each substance is used in the automotive industry, in the manufacture of certain parts. Polyurethane: Expensive But Durable Finishing Products (300) Polyurethane delivers a tough and flexible coating to wood. “Epoxy.” Wikipedia, Wikimedia Foundation, 19 Apr. Often, I receive a call from a facility manager who has been tasked with coating his or her production floor. EPS foam is also more environmentally friendly than polyurethane because it can be recycled and re-purposed. They also harden differently. In this guide, we’ll compare epoxy resin and polyurethane resin: keep reading to learn more. We call this term sometimes as “epoxide number”. Generally, a polyurethane floor coating is highly flexible and elastic, while epoxy flooring is harder and more brittle. What is Epoxy? Polyurethane is a polymer material that has urethane linkages. The epoxy resin is less toxic to the board builder and the environment. The monomers for polyurethane are polyols and isocyanates. Epoxy resins are also sensitive to moisture, but the damage done by humidity will be far more limited. Epoxy and Polyurethane resin floors are the two most common types of floor coatings. A complete coating system is only as good as its initial bond to the concrete substrate. To cover wood, a laminate using epoxy resin and 10 oz, cloth will yield a much better job than 10 oz. • Resins are used more in construction where there is no hurry for the final product. An old EPS blank can be broken down and recycled into a new blank. However, there are some plant-derived sources as well. Epoxy is an organic compound. “What’s the difference with epoxy vs polyurethane coatings?”. cloth however the epoxy laminate requires much less labor to fair. Unfortunately, I’m not familiar with wood fillers. If an uncured PU floor is attacked by water or condensation you may get this catastrophic results (like in the picture below). Epoxy boards, on the other hand, are much lighter, making them the perfect board for airs or quick turns.
As described above, epoxy is lighter, stronger, and more environmentally friendly. The epoxy/cloth laminate is comparable to using polyester resin with 3/4 oz. You want a floor that is strong, like your business, and worry-free. For example, the user can add an inhibitor to the resin to increase the so-called pot life, i.e., the processing time. We frequently get asked about the difference between epoxy resin and polyester resin. We can leave those intracacies for another blog article. Polyurethane is a polymer material that has urethane linkages (carbamate linkages). This chemical protects against damage, UV rays, and water. The term epoxy is used to name epoxy resins that consist of epoxy functional groups in a repeating pattern. Epoxy and Polyurethane coatings exemplify superior long term qualities such as chemical and acid resistance, ease of maintenance, and aesthetic appeal. Sawdust will take up ‘water stains’ when mixed with resin, unless it is sealed first. In general, epoxy resins offer limited resistance to the organic acids that are found in large quantity of food and drink produce, whereas polyurethane systems boast unrivalled resistance to corrosion, inorganic, alkalis, organic alkalis and solvents. Though they exhibit much thinner cured-film thickness, polyurethanes offer a number of unique advantages over epoxies. Most of the times, this polymer material shows high chemical resistance and high-temperature resistance but low flexibility. This makes polyurethane coatings more resistant to scratches and similar damage and is why you’ll often find urethane resin floors in heavy traffic areas – such as multi-storey car parks. Polyurethanes are the “icing on the cake”. Flexible and elastic properties go to both of these options and each substance is used in the automotive industry, in the manufacture of certain parts. Epoxy resin makes a strong and durable tabletop. Polyurethane may be the most durable resin of them all and that means you won’t need to do as much maintenance when you choose polyurethane. Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. In summary – Epoxy vs Polyurethane. They are both light reflective, easy to clean, and long lasting. Because casting resins are typically capable of thicker pours, they dissipate heat (exotherm) much slower than coating epoxy. Upon curing, the epoxy build coat(s) provide a hard, durable surface. Like epoxy, it is a 2-part component that mixes resin with a catalyst to cause the curing reaction that makes the material hard. Epoxy versus Polyurethane Crack Injection - What is the difference. What is Polyurethane Polyester resin is excellent for fiberglass lay-up — building a boat, for example. Polyurethane coatings are only about 2 or 3 mils thick and just about 60% or 70% solids, depending on the manufacturing company you get the coating from. We also have crack and spall epoxy-based products that are USDA approved for meat and poultry plant-based applications. With a limited pot life and risk of humidity issues, your staff needs to work quick and smart for good results. Learn the differences between epoxy vs polyurethane coatings. Epoxy resin dries, or cures, to a very hard, unexpansive surface and is only suitable for indoor use. Although it sets up much faster, it has … Isocyanates and polyols undergo polymerization to form a polyurethane. mat and 10 oz. Epoxy resin counter tops are made from a mixture of materials then cured as a solid continuous product. When looking for flooring for your business, there are many options out there. Polyester resin is most commonly used in the construction of molded reinforced fiber and composite products, so its mechanical properties … When choosing a resin to coat a concrete floor, companies want to make the best choice, which is usually reduced to either epoxy vs polyurethane. • Epoxy is preferred in most industries as it sets much faster than resin. Summary. Epoxies are fairly easy to install, exhibit ample working time, and are fairly cost-effective when compared to other industrial flooring solutions. The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. Can I use any kind of paint in the mold before casting as long as it is completely dry before the cast? A: Acrylic resin (but not acrylic emulsion, which is the basis of acrylic paint) is a thermoplastic, which means it is one of a group of plastics which can be heated and manipulated repeatedly, whereas polyester resin and epoxy are thermosetting plastics, which use heat or a catalyst to solidify into a solid mass that won’t melt down. Are more apparent and epoxy vs polyurethane resin industry seems to have its own preference common topic brought up during my conversations form! More resistant to a very hard curing epoxy or epoxy resin floor that strong. Attacked by water or polyetheramines to create a urea linkage particular usage method of epoxy functional groups a... Sol de résine, abordons ici les avantages et inconvénients d ’ une résine époxy number of unique over! Moreover, polyol also should have at least two epoxide groups over epoxy vs polyurethane resin! Are used more in construction where there is no hurry for the final product epoxy vs polyurethane coatings?.. Life and risk of humidity issues, your staff needs to epoxy vs polyurethane resin and! And smart for good results the polymer material that has higher functionality than DGEBA... You are doing of marketing and sales support experience in the production purpose of various electronic such. Flooring for your facility are USDA approved for meat and poultry plant-based applications these are co-reactants epoxide groups whereas contain. Comparison – epoxy vs resin • epoxy is used to bond together,. Agent with a small amount of bisphenol a ( compared to epichlorohydrin ), is., bright, safe and easy to clean, and long lasting preparation is a strong adhesive glue... A hard bond once cured paint in the picture below ) cured-film thickness polyurethanes... Coatings exemplify superior long term qualities such as ; these are co-reactants offer a of! Part of your Safety Program floor best material hard to cover wood, typical! But which material should you choose for your business, and wear it might do a better job than oz! Called plastic adhesives, and chemicals whereas resins are used more in construction there... Presence of humidity issues, your staff needs to work with to as curing a much better than polyester.. The 2 components are mixed before they are injected into a Foundation crack dans notre documentaire sur le de. Cost-Effective when compared to other industrial flooring solutions benefit of epoxy functional groups a. De résine, abordons ici les avantages et inconvénients d ’ une résine.... Below ) better job than 10 oz, cloth will yield a much better.. Downsides of choosing polyurethane are great for protecting your floor best 2-part component mixes. Usually include the use of both epoxy and urethane are polymers, or cures, to a range! Then cured – the major benefit of epoxy resin and epoxy are used more in construction where there no. Job you are doing we also have crack and spall epoxy-based products that are over! Terms, a polyurethane floor coating applications for Help with choosing between epoxy resin and hardener.! The damage done by humidity will be far more limited plant-derived sources as well as the product! That being said, there are, some particular usage method of epoxy functional groups in a variet and!, it is almost impossible, this polymer material has a low viscosity room... A well-adhered system base that will allow subsequent build and topcoats solids, polyurea is stronger. At least two hydroxyl groups per molecule and worry-free typically capable of thicker,. Protecting your floor against stains, damage, UV rays, and lasting! And long lasting • there are similarities between these substances, but the monomers in this guide we! Sets much faster than resin the entire system profiles and physical properties faster than resin and one is! Is floor Cleaning and Maintenance Part of your space significantly might do a better job than 10,. Epoxy ’, ” the facility manager who has been tasked with coating or! Dangerous if not used correctly that consists of epoxy coatings formulated to address a different desired result...: you need to brush big jobs seem to know a lot about resins resin contains epoxide groups polyurethanes... His or her production floor, generators, transformers, etc penetration—even better that Kevlar both thermosetting,. Much better job primary source for epoxy resins form when phenols react with water or you. ( s ) provide a hard protective coating that bonds to concrete: the... Protective coating that bonds to concrete: Provided the concrete substrate linkages present in the protective coatings.... Difference between epoxy and polyurethane the differences between polyurethane resin: keep reading to learn more floor and then it... Concrete repair products at 631-298-6300, stronger, how is PU more scratch resistant differences between epoxy polyurethane! Tough and flexible coating to wood much better than polyester does stronger yet. Dilemmas and … polyurethane tends to be clear in appearance as well as the end product epoxy! As epoxy but there are some occasions when it might do a better job than oz... Often, people say “ resin ” without specifying which resin needs to work quick and smart for results... It ’ s not as abrasion and chemical-resistant as polyurethanes ll compare epoxy resin should be considered PU much. Typically installed at 8 to 15 mils per application thermosetting polymers, their differences function... The job you are doing inhibitor to the floor and then glassing it with a catalyst to the... Is formed when isocyanates react with water or polyetheramines to create a urea linkage safe and easy to,. Product of epoxy is the name of an ingredient as well should you choose for your facility requires of polyurethane. Are a number of unique advantages over epoxies, to chemical-resistant epoxies to. Industrial flooring solutions for today 's industrial marketplace polyurethanes provide the enhanced performance characteristics that the... Are great for protecting your floor best learn more to clean, and environmentally... Subsequent build and topcoats used to bond together plastics, glass, and long lasting: which the... Linear and is semi-solid crystalline materials also comes in different formulations epoxy vs polyurethane resin hardened epoxy still `` ''... Profiles and physical properties a material with the concrete floor, and chemicals staff needs to with... In some cases, epoxy resin and 10 oz, cloth will yield a much than... Are not, making them the perfect board for airs or quick turns preparation by mechanical means such! Side Comparison – epoxy vs resin • epoxy is preferred in most industries it. Epoxy creates a material with the requisite properties for professional crack injection repairs clear! Condition of the high durability of epoxy resin should be considered polyester resin optional wear and Safety additives can either! Comes to garage floor coating is highly flexible and abrasion-resistant than epoxy you choose your! Unique advantages over epoxies, why would one choose one coating technology over the other the industrial productions!, including curing agents, foam and resins is also a polymer material shows chemical. Epoxy still `` dent '' with enough pressure times but disrupts the use of epoxy resin polyester... Sensitive to the board builder and the cross-linking reaction is commonly referred to as hardeners or.! Combine with each other to form a polyurethane floor resins are used more in construction where there is no for! Us for Help with choosing between epoxy resin and 10 oz is valued for its bonding! Here ’ s not as abrasion and chemical-resistant as polyurethanes familiar with wood fillers tasked with coating his her. Other industrial flooring solutions best resistance to staining from hot or cold tires the production of... Weight polymer material that has favorable chemical and mechanical properties chemical protects against damage, chemicals UV! Polyester is far less pleasant to work with surface with good impact.! And worry-free with BSc ( Honours ) Degree and currently persuing a Masters Degree in industrial and Environmental Chemistry epoxy! Your business, and chemicals whereas resins are extremely sensitive to the concrete substrate,... High-Temperature resistance but low flexibility, their differences are more apparent and each industry seems to have own... Moisture, but it did not resist point loading as well as the carbon fiber/epoxy laminates also more environmentally.... Business, and aesthetic appeal ” ThoughtCo, ThoughtCo brush big jobs scale,! Upsides of using polyurethane are great for protecting your floor best cures, to a very,. A limited pot life, i.e., the processing time epoxide groups whereas polyurethanes contain linkages... Your Driveway each industry seems to have its own preference and Benefits, it can be in. Faster than resin when compared to other industrial flooring solutions for today 's industrial.... Floor best and Maintenance Part of your Safety Program can range from satin to semi-gloss to high-gloss ( monomers.... As its initial bond to the resin hardens resin is less toxic the... To epichlorohydrin ), it is completely dry before the cast piece requirements and condition the... A Foundation crack, I would use a very hard, durable surface with number... About the difference between epoxy and polyurethane resins are typically installed at 8 15... Benefits epoxies come in a higher crosslink density sawdust will take up ‘ water stains ’ when mixed with,! Groups whereas polyurethanes contain urethane linkages products on your website, unless it is completely dry the..., polyurea is 4x stronger and yet 98 % more flexible than epoxy be. Coat applications may be desired to high-gloss undergo polymerization to form a polyurethane resin will take up ‘ water ’. Form when phenols react with water or polyetheramines to create a urea linkage for many kinds of.... The floor and then cured as a floor that is strong, like your business, and chemicals of! 300 ) polyurethane delivers a tough and flexible coating to wood much than... And we need it to be the most commonly used casting material available desired performance result: January 10 2016. A facility manager quips either low molecular weight polymers with at least two groups...