www.truckandtrack.com Winter 21/22 Truck and Track 43 environment is moisture-laden, humid, below freezing, or hot. Polyurea is also preferable when you need a coating that can flex with the expansion of a substrate, or want a super hardwearing level of abrasion resistance. What Does Polyurea Mean? This is polymer material that is used to make coating and lining substances. Polyurea is the pillar of most coating and lining products that provide resistance against corrosion and abrasion. It is normally used in corrosion prevention due to its remarkably fast setting time period, resistance to atmospheric or surrounding attack, high elongation and durability. It is used in coatings that provide corrosion prevention in fields like construction, automotive and manufacturing or processing industries. What are the Unique Features of Polyurea? There is no coating system that can successfully replace polyurea in all respects, due to its unique physical properties and durability. However, its surface preparation requirements are very stringent. Polyurea protects wooden, concrete and steel surfaces and structures from abrasion and corrosion damage. It can help preserve a deteriorating concrete structure and help repair and keep canals intact. It resists scratches, chemicals, oils and salts in commercial and industrial floor applications. It can also preserve boats and other vessels by providing protection from cracking and deterioration. Advantages of polyurea coatings include: ■ Very fast setting (curing time typically 5 to 10 seconds). ■ Excellent abrasion and scratch resistance. ■ Very stable resistance to weather and environmental conditions. ■ Very beneficial elongation characteristics. ■ Can be applied in variable temperature conditions, even in high humidity. ■ Stable heat resistance up to 130°C (266°F) and short-term rating of 220°C (430°F). ■ Coating thickness can be finely controlled. ■ Very effective bonding on correctly prepared surfaces of wood, cement, concrete and metals. ■ Excellent chemical resistance. ■ Feasibility of low viscosity, thus enablingmixing and spraying at desired temperatures. ■ Can be formulated for a very high tensile strength up to 4350 psi. 50 Year Warranty The reliability of the proven polyurea hot spray application system is unrivalled which is why we offer a comprehensive 50 Year Warranty. It’s important to remember that most warehouse raw concrete floors have a two to eight year lifespan depending on the volume and scale of traffic within the site. So most concrete floors will need to be completely replaced up to five times in the same life as our warranty and, in reality, the polyurea application often lasts longer than 50 years. What are the Limitations and Critical Issues for Polyurea Coatings? Polyurea coatings do have some limitations and special considerations. Because the coating is highly reactive and quick-curing, setting of the coating without adequate wetting out time can cause poor adhesion to the substrate. Formulators must ensure complete wetting out of the surface before the coating sets. It is a tricky situation. Aromatic polyurea coatings may react to UV radiation, resulting in color changes and chalking. The aesthetics are negatively affected by UV radiation. For those applications that require visual appeal, an aliphatic polyurea must be used. Hot spray applications require specialized and sophisticated spray equipment that are able to generate high pressures and high temperatures. Technicians must be specifically trained for this task. www.londonwaterproofingspecialists.co.uk LONDON WATERPROOFING SPECIALISTS
RkJQdWJsaXNoZXIy OTE1MTA=