Nowadays, there is an evident interest and demand of the industrial and domestic energy sectors to start the energy transition from fossil fuels-based energies to renewable sources. New and efficient clean power have to be implemented and Solid Oxide Fuel Cells (SOFC) are a suitable candidate to address this challenge. SOFC stacks are composed by several elements (cells, interconnects, endplates, sealants) that need to be optimized in order to maximize their performance. This work presents the implementation of glass-ceramic sealants in the setup used for large area SOFC cells, single repeating units (SRU) and stack tests at IREC. Two commercial sealants were studied, one produced by tape-casting (sealant 1) and another in form of powder (sealant 2) that was deposited by robocasting.