Science and Education Publishing American Journal of Mechanical Engineering 1 7 2013 11 22 Experimental Detection of Functional Properties of the Semi-Rigid Fillers 451 456 EN Peter Sivák Department of Applied Mechanics and Mechatronics, Faculty of Mechanical Engineering, Technical university of Košice, Košice, Slovakia AJME20131760 10.12691/ajme-1-7-60 2013 10 24 2013 10 31 2013 11 22 Possibility of quick fixes or need to extend life of existing thin-walled structural elements, such as pressure vessels, piping and other, workers under internal pressure media, seems promising application of pressurized protecting sleeve. Such a sleeve could consist of a divided metal housing or jacketed sleeve and curable sealing elements or curable filling materials. This solution is particularly suitable for repairing corrosion-damaged pipelines. The main problem of this technology is to select an existing filling material. Materials as fillers must meet a number of specific requirements. One of the main goals was to determine the rate of decline in the relative volume changes and the rate of pressure drop. Appropriate method was chosen using the results of strain measurement.