ABSTRACT The seismic isolation technique is one of the most effective methods to control the seismic vibrations of structures by isolating them from the ground. In this research, an experimental and numerical study of a proposed elastomeric seismic isolator is presented. The proposed seismic isolator is composed of three components: rubber, top, and bottom connection plates, as well as steel rings, to enclose the rubber elements. Compared to common LRB isolators, the lighter weight of the proposed isolator and lower cost are the main features of these new bearings. The goal is to provide a low-cost seismic isolator for one or two-story masonry buildings, reservoirs containing hazardous materials, sensitive equipment, and other applications of seismic isolation for light to medium weights. In this research, a low- damping type natural rubber is used in the fabrication of the proposed seismic isolator with steel rings (SISR). First, using a preliminary FE modeling of the rubber material, the strain energy function (SEF) and the Yeoh hyper-elastic material, the required dimensions of two sizes of the proposed SISRs, to carry 25 kN and 80 kN vertical loads, for two cases of structural application, are determined and two samples for each size of the SISRs are fabricated. Prototype tests of the specimens subjected to the predefined vertical and lateral load patterns are carried out and the performance of SISR specimens is evaluated. The complete testing process of two sizes of the proposed SISR is also simulated by finite element analysis and the numerical results are presented. The force-displacement curves of SISRs, obtained from the tests and numerical analyses, show a satisfactory correspondence and satisfy the requirements of isolator units in accordance with ASCE 7 standard.