Mullerat provided free medical care to the poor and would also help them with their material needs. He was a staunch Catholic traditionalist who resisted liberalist interpretations of Catholic dogma. He once had a debate with Dr. Fuset who denied the premise of the Immaculate Conception. This pained him but spurned him on to defend Catholic dogma when others sought to challenge it. He later served two consecutive terms as the mayor for Arbeca from 29 March 1924 until March 1930. During his term he cracked down on those who made blasphemous claims and slander and also assisted in organizing religious solemnities. His term was also marked with some urban and health initiatives to better Arbeca. In 1931 the Second Spanish Republic was proclaimed and he had reason for concern. Mullerat was aware of the seriousness coupled with the rise of Francisco Franco and realized the dangers it posed to him and those around him. The anti-Catholic sentiment encroaching into Spanish live also had reason to cause him alarm as did the persecution of priests and religious sometime later just prior to and in the Spanish Civil War.
