VersaFlex SL/75™ Fascia Bond strength vs. Tensile strength VersaFlex SL/75™ tensile strength, nominally reported under ASTM D412 at 620 psi, develops sufficient strength against cohesive failure (material ripping apart internally) to cause fascial disbondment from the concrete joint (tensile strength of the concrete at the joint fascia, 300-600 psi) when joint expansion stresses develop. We…
Salts 101: An Overview Soluble salts are very much at the forefront of discussion in the coatings industry. There is much information available on the topic, but often is provided in small segments so a complete comprehension is not easy to grasp. It is the purpose of the following to provide an overview to assist…
Moisture In Concrete: Understanding its Effects on Coatings Moisture, pH, and Alkalies: Freshly placed Portland Cement has a pH level of 12.5 (highly alkaline); it will provide passivation of embedded steel. Carbon Dioxide and ambient air react, meaning that: Over time, concrete pH will reach 8.5 Carbonizing starts from the surface and moves down at…
Joint Fill Material Calculation Chart Download full PDF here.
Irradiation Evaluation of Polyurea Spray Elastomers 100% Solids, two-component polyurea spray elastomer systems are being utilized in a wide variety of application areas. In most cases, the systems are exposed to typical environmental conditions with excellent performance. A recent interest has been in coating applications where levels of nuclear radiation may be present. To evaluate…
Holiday / Spark Testing for Applied VersaFlex® Polyurea Elastomer Systems For application of VersaFlex Incorporated polyurea spray elastomer lining systems, the use of Holiday / Spark testing may be employed to verify that a continuous, void-free lining system has been installed. Details of testing procedure can be found in the NACE International Standard Practice document…
Liquid Flash Point and Flammability of Cured Polyurea VersaFlex FSS 45DC™ and FSS 50DM™ Flash Point: VersaFlex FSS 45DC™ and FSS 50DM™, part A and part B, have flash points in excess of 200° F while in their liquid form. Ignition: Cured polyurea has high glass transition and heat of deflection temperatures, however, it will burn when…
Application Technical Note: Concrete Surface Preparation General Discussion: This provides recommendations for conditioning and preparing concrete surfaces for installation of polyurea systems. There is no such thing as too much surface preparation. Good enough generally isn’t good enough. Regardless of system selected, poor preparation may waste money and effort. Poor preparation will certainly result in…
Results of Cathodic Disbondment of Coating Test / Third Party The following tests were run as described below. The product tested was VersaFlex FSS 50DM(cat) spray polyurea. The testing was undertaken to establish performance baseline criteria in accordance with industry standards for resistance of coatings to cathodic disbondment and other physical properties when polyurea is…
Application Technical Note: Pinholes & Bugholes This Technical Note does not address the loss of aggregate at the time of form removal. Rock pockets, form seams and other such discontinuities are beyond the scope of this Technical Note. Simple outgassing of concrete, covered in pinhole resolution, is beyond the scope of this Technical Note. PROBLEM:…