Master Bond UV15X-2 is a new one component, non-yellowing UV curable polymer system for high performance coatings, adhesives and sealants with exceptionally fast response to UV radiation. It is 100% reactive moderate viscosity liquid at ambient temperatures which does not contain any solvents or other volatiles. When exposed to a source of UV light, Master Bond Polymer System UV15X-2 produces durable, tough, non-yellowing and chemically resistant coatings and adhesives and sealants with excellent electrical insulation properties. Maximum absorption of UV energy takes place in the 250-360 nanometer range. The cured coatings, adhesives and sealants can be used over the exceptionally wide temperature range of -60°F to +300°F. Unlike many other commercially available UV curing products, the Master Bond Polymer System UV15x-2 is not oxygen inhibited and exhibits a desirably fast curing rate of ambient temperatures even in the presence of air. The Master Bond System UV15X-2 can be cured in much greater section thicknesses compared to the typical commercial UV curing polymer systems now on the market. Thus UV15X-2 can be easily cured in thicknesses up to 1/4" and more, making it of value for various electronic and optoelectronic potting/encapsulation applications. This performance characteristic is due to its uniquely effective catalyst system. Master Bond Polymer System UV15X-2 can be cured in very short time periods depending upon type of UV lamp, distance of the lamp from the surface of the UV15X-2, thickness of the section of the UV15X-2 to be used, etc. Typical cure times range from as little as 3 seconds to 2-3 minutes at ambient temperatures. 200 watt/inch medium pressure mercury vapor lamps are recommended. Curing line speeds as high as 500 ft./minute and more have been obtained for thin films of the UV15X-2 polymer system. no solvents or other volatiles are released during the curing process. Cured coatings, adhesives and/or sealants feature a desirable combination of outstanding durability, toughness and thermal shock resistance as well as excellent adhesion to a variety of substrates ranging from bonderized steel and aluminum to polyester films. Impact resistance is superior.