MIT engineers have developed a polymer coating, 2DPA-1, that is highly impermeable to gases, making it ideal for protecting solar panels and extending the lifetime of perovskite crystals. This material, stronger than steel but much lighter, repels gases such as nitrogen and oxygen with permeability at least 1/10,000 that of other polymers. The unique structure of 2DPA-1 has shown remarkable results, making it a promising solution for protecting infrastructure exposed to the elements. Climate solutions experts should take note of this innovative development in materials science for enhancing the durability and efficiency of renewable energy technologies.