The main component of clay are Silica (Si) 38,51%; Magnesium (Mg) 37,98%; Oxysigen (O) 37,98%; Aluminium (Al) 14,50%; Iron (Fe) 5,41% Pottasium 1,69% dan Titan (Ti) 0,69%. High silika content make a clay can be used as a filler on making gas cylinder seal. Gas cylinder seal is a rubber seal used in gas cylinder as a connector between LPG and stove. The research aim to make a gas cylinder with c…