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Polyurea Boasts Chemical Resistance

Thursday, March 10, 2011

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Ultimate Linings

Ultimate Linings has introduced a fast-setting, 100% solids, two-component spray polyurea for a variety of industrial concrete and metal applications.

Ultimate Linings calls UL KG 8012 a rapid-curing, flexible, aliphatic, color-stable coating with a fast gel time that makes it suitable for applications down to -20°F.

Typical applications include airports, power plants, refineries, structural steel, marine environments, waste water treatment plants, and industrial and manufacturing facilities.

The coating may be applied in single or multiple applications without appreciable sagging and is relatively insensitive to moisture and temperature, allowing application in most temperatures, the manufacturer says.

Product Features

Polyurea is a coating, lining and joint sealant technology used for many different applications, but it is most commonly applied over concrete and steel for corrosion protection and abrasion.

KG 8012 comes in Clear and Neutral, with custom colors available upon request.  According to the manufacturer, the coating is odorless, has no toxic vapors and is zero VOC, with excellent thermal stability.

The product coats most metals without a primer, is suitable for exterior or interior applications, and can be installed with or without reinforcement in transitional areas, Ultimate Linings says.

Surface Preparation

Polyurea coatings rely on the structural strength of the substrate to which they are applied, the manufacturer notes. All surfaces must be free of dust, dirt, oil, grease, rust, corrosion and other contaminants.

When coating substrates previously used, it is important to consider the possibility of substrate absorption, which may affect adhesion of the coating system, regardless of the surface preparation, the manufacturer advises.

For steel substrates (atmospheric and immersion exposure), all oil, grease, and weld spatters should be removed and any sharp surface edges rounded off. Minimum surface preparation is Near White Metal Blast Cleaning per SSPC-SP10/NACE 2. Optimum surface profile is 2-3 mils. Prime and shoot UL on to any bare metal the same day it is cleaned to minimize potential flash rusting.

Aluminum should be blasted with aluminum oxide or sand (not with steel or metal grit), washed with a commercially available aluminum cleaner, allowed to dry, then primed.

Stainless steel and cast iron may be grit blasted and degreased before priming. Some stainless steel alloys are so inert that a satisfactory bond may not be possible. An adhesion test is recommended before starting the project.

Old cast iron is difficult to prepare for a satisfactory bond. It can absorb oil and water-soluble contaminants that will keep returning to the surface after coating application and affect adhesion. An adhesion test is recommended before starting the project.

More information: http://www.ultimatelinings.com.

   

Tagged categories: Concrete; Marine; Marine Coatings; Polyurea; Protective coatings; Steel; Structural steel; Two-component coatings; Wastewater Plants

Comment from sarangapani venugopal, (3/14/2011, 1:35 AM)

Polyurea as of now to my knowledge is a very quick setting coating with very short gel/pot life, necessitating special plural component spray gun, which is a costly equipment. Besides the applicator should be trained person and hence it is not application friendly and not suitable for small areas. A brushable-cum-spray polyurea coating will have wider acceptance.


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