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:…
VF 20™ Application Techniques for Concrete Substrates 1. Prior to application of VF-20 primer insure that all concrete surfaces are prepared to SSPC SP13/NACE No. 6, Surface Preparation of Concrete standard. 2. Concrete and masonry surfaces must be dry. Moisture content of concrete surface to be less than 5.0% when tested with a Tramex Concrete…
Displaced Fine Particulates Technical Note: DFP – Displaced Fine Particulates Since the introduction of coal fly ash into many of the new concrete mix designs, fine particulates are troweled into the surface where they have the probability of being displaced from the concrete. This is especially evident when any adhesive type material is applied to…
“How to Minimize Shrinkage” Originally published in Concrete Contractor Written by: Kim Basham, PhD PE Drying shrinkage is the root cause of random cracking in unreinforced concrete floors. Drying shrinkage is caused by a loss of moisture from the concrete. It occurs after concrete hardens and continues months and even years depending on the slab…
Polyurea Life Expectancy Discussion A question has recently been asked as to the life expectancy of a polyurea spray elastomer system as it relates to an application in an immersed saltwater environment. While this question is really not new to the technology, it seems that there has not been any published data or information to…
QUV Weatherometer Testing: (ASTM G 53) QUV Weatherometer accelerated testing (ASTM G 53) has been used as a tool to evaluate the performance of polyurea spray elastomer systems. By using this technique, one can observe the physical affects of simulated sunlight on the surface properties of the exposed elastomer as well as physical property retention.…