Within the epoxy anchoring adhesive products category, we offer SET-3G™, SET-XP® and ET-HP® adhesive anchors. Of course, concrete preparation is a crucial part of establishing a proper bond. 2. Therefore, the cross-linking reactions that epoxy resins undergo with these curatives refers to “curing”. The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. 1. Figure 02: A Chair made from Polyurethane. Epoxy is an excellent adhesive to use for concrete surfaces. 3. @media (max-width: 1171px) { .sidead300 { margin-left: -20px; } } Years ago, the common practice was to chunk out both sides of the crack, essentially making it larger, then using hydraulic cement to fill the void. Epoxy is not resistant to ultraviolet light so, while it will not change color immediately, the epoxy will begin to yellow after several months or years. I’ve been researching products on your website. Take our FREE Flooring Self-Assessment today! The unit for this measurement is “mol/kg”. Epoxy vs Polyurethane. However, there is one downside to epoxy primer. Madhu is a graduate in Biological Sciences with BSc (Honours) Degree and currently persuing a Masters Degree in Industrial and Environmental Chemistry. A complete coating system is only as good as its initial bond to the concrete substrate. Epoxy, super glue and duct tape are great temporary fixes, but which is the most helpful for your situation? They are both light reflective, easy to clean, and long lasting. “I thought all floor coatings were ‘epoxy’,” the facility manager quips. Optional wear and safety additives can be incorporated into the topcoat texture. We can leave those intracacies for another blog article. Both epoxy and polyurethane are polymer materials. The evolution of sealing cracks technology over the last decade has been astounding. PU also resists damage from many different threats well, including solvents, alkalis, and sources of corrosion. 2. Epoxy vs Methacrylate vs Urethane Adhesives. It is said that epoxy offers higher strength than urethane. Is Floor Cleaning and Maintenance Part of Your Safety Program? We love epoxy, as you will know if you’ve spent any time on this site, but the first type of glue that gets considered in wood working projects is usually poly-vinyl acetate (PVA) wood glue and for good reasons. Whilst a polyurethane system will initially cost more compared to an epoxy, it is far more cost effective in the long term. The monomers for polyurethane are polyols and isocyanates. Prior to that, Sean worked in the construction industry, specializing in contract and project management for commercial and industrial floor and roof projects. Available here In fact, the lifespan of the PU system is roughly double that of the epoxy, clocking an impressive ten-year’s compared to the epoxy’s five. Side by Side Comparison – Epoxy vs Polyurethane in Tabular Form With a mind rooted firmly to basic principals of chemistry and passion for ever evolving field of industrial chemistry, she is keenly interested to be a true companion for those who seek knowledge in the subject of chemistry. The key difference between epoxy and polyurethane is that the epoxy contains epoxide groups whereas polyurethanes contain urethane linkages. Polyurethane is also a polymer material that contains urethane linkages. This thickness allows the coating to chemically bond to the epoxy primer, and is thick enough to self-level and fill minor concrete blemishes and hairline cracks. Epoxy Benefits. Polyurethane is a polymer material that has urethane linkages (carbamate linkages). It’s not a matter of choosing one over the other, but a matter of utilizing both to achieve the desired result: Epoxy primers for bonding the system to concrete, epoxy build coat(s) for total system build/thickness, and polyurethane topcoats for enhanced physical performance, chemical-resistance, safety and aesthetics. Previously, the term "glue" was used exclusively for natural adhesives (boiled horse hooves, etc…) and "adhesive" was used for synthetic products. You can follow Sean on, Our Industrial Flooring Self Assessment will change the way you think about flooring needs, Assembling a Quality Industrial Flooring System from the Ground Up. It’s not a matter of choosing one over the other, but a matter of utilizing both to achieve the desired result: Epoxy primers for bonding the system to concrete, epoxy build coat(s) for total system build/thickness, and polyurethane topcoats for enhanced physical performance, chemical-resistance, safety and aesthetics. Compare the Difference Between Similar Terms. Firmness and flexibility are important. Though epoxy is strong, it will crack on surfaces that frequently move. Epoxy or epoxy resin is a class of polymer material consisting of epoxy functional groups. Polyurea systems use urethane-based technology throughout the entire system and provide outstanding UV resistance. Finishes: Polyurethane finishes can range from satin to semi-gloss to high-gloss. An epoxy primer cannot withstand UV ray as good as urethane. Some other names for these co-reactants are hardeners or curatives. Additionally, the offer excellent resistance to staining from hot or cold tires. Cyanoacrylates, Epoxy Adhesives, Polyurethane Adhesives, Structural Acrylic Adhesives and UV Cure Adhesives all bond well to composites. The crosslinking process forms a thermosetting polymer that has favorable chemical and mechanical properties. PU systems also benefit from their increased wear, abrasion and impact resistance properties. Although it cannot be used as a complete adhesive, some of the multiple products must be added to it to make it an adhesive. Polyurethane glue has a lot of the same qualities as epoxy without the disadvantage of requiring the mixing of a resin and hardener. With the number of advantages polyurethanes have over epoxies, why would one choose one coating technology over the other? Epoxy adhesives, methacrylate adhesives, urethane adhesives…what are they? These range from flexible epoxies, to chemical-resistant epoxies, to fast-setting epoxies, etc. Epoxy and urethane are important components in the adhesive and foam industries. Polyurethane coatings produced by Hychem are varied, consisting of water-based, solvent based, 100 percent solids and cementitious products. Epoxy adhesives can be selected instead of polyurethane adhesives because they are characterized by greater thermal strength and a longer “working life” (30–35 min) which allows the bonding of larger size pieces with less chance for wastage; their higher cost is partly offset by the smaller quantity required. Epoxy resins can react with each other via catalytic homopolymerization and form cross-links between them. 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. Epoxy and polyurethane are booth chemical resins with different reaction profiles and physical properties. 2.’Polyurethane chair, Walker Art Gallery’ By Reptonix free Creative Commons licensed photos (CC BY 3.0) via Commons Wikimedia. Epoxy ; Polyurethane Glue; Hide Glue; Poly-Vinyl Acetate (PVA) Wood Glue: Cheap & Cheerful. These monomers combine with each other to form a polymer. What adhesive types are best for bonding composites? The primary use of epoxy resin is for adhesive purposes. These two components are thoroughly mixed together, applied to the concrete floor, and allowed to cure. 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. Which coating would you recommend?”. 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. The monomers for epoxy resins are phenols and epichlorohydrin, but the monomers may vary depending on the type of epoxy resin. In emergency repair of wet wood, polyurethane is the adhesive of choice, as long as the parts are kept together with clamping or with temporary screwing. “Epoxy.” Wikipedia, Wikimedia Foundation, 19 Apr. So which adhesive type is the best? There are certainly different types of epoxy coatings formulated to address a different desired performance result. If we increase the amount of bisphenol A (compared to epichlorohydrin), it provides high molecular weight polymer material. Polyurethanes provide the enhanced performance characteristics that protect the entire system. The term epoxy is used to name epoxy resins that consist of epoxy functional groups in a repeating pattern. All rights reserved. When a component becomes dislodged, replacement is a good solution, but sometimes you need a faster solution until you can get to the repair shop. Available here, 1.’Epoxy’ By Dzhang2680 – Own work, (CC BY-SA 3.0) via Commons Wikimedia  Epoxy is a strong adhesive or glue that does essentially not expand. Urethane, which is resistant to ultraviolet light, will remain the same color for a much longer time than epoxy. It is a form of polyurethane. Of the two, epoxy is a higher-strength substance that prevents a surface from moving. He has over 15 years of marketing and sales support experience in the protective coatings industry. Not sure what type of polymer floor coating system your facility requires? Chemical-Resistance: Polyurethanes are resistant to a broader range and concentrations of chemicals. Polyurethane is another resin for floor coating concrete and steel. These polymers can be either low molecular weight or high molecular weight polymers with at least two epoxide groups. They are all 2-part structural adhesives, but … It is recommended that materials be clamped during curing which occurs in approximately four hours (Note: Check the manufacturers cure time on the packaging as some polyurethane glues have cure times as long as 24 hours). 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. This sealing role usually involves waterproofing the bond, protecting it from loosening because of dynamic loads, and lessening the chances of bonds deteriorating due to oxidation and corrosion. This polymer material has a low viscosity at room temperature. “It’s bare concrete and we need it to be durable, bright, safe and easy to clean. Within this group of products we have properties including excellent UV and weather resistance, abrasion resistance, high heat and chemical resistance and also flexible products used as membrane systems for both foot and vehicular traffic. Our epoxy, with urethane topcoat, is designed to be UV resistant. Epoxy and polyurethane are great for protecting your floor against stains, damage, chemicals, oils, and wear. However, there are some plant-derived sources as well. Available here  Though they exhibit much thinner cured-film thickness, polyurethanes offer a number of unique advantages over epoxies. Isocyanates and polyols undergo polymerization to form a polyurethane. Epoxy vs polyurethane is a common topic brought up during my conversations. This practice over time made things worse. The conversation usually starts off something like this: “I need you to take a look at my concrete floor,” the facility manager says. 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