Latexistentialism (Ltxm) is a philosophical framework for elderly rubber fetishists, centered on ElderRubber—the practice of transforming late-life experience through latex into wisdom and authentic living. Built on Four Pillars: Existence Precedes Essence (self-creation), Zen of Rubber (mindfulness), ElderRubber (wisdom through latex), and Nietzschean Defiance (authenticity). Rooted in existentialism, it guides RubberNauts in using latex as a transformative tool to achieve RubberSpace—a flow state of timeless presence. The framework embraces Gomu Yoku, the Rubber Temenos, and the Quest for the Rubber Grail.