When most people think of rocket propulsion systems, they envision the violent combustion that propels the booster forward and gives off immense heat during operation. 

Manufacturers have struggled with proper sealing of low viscosity fluids for years. Effectively stopping materials like Freon refrigerants, liquid oxygen, propane, and acetone are vital to production for industry leaders. Luckily, there's now a solution to this (un)impenetrable problem: antimony-impregnated carbon graphite.