Why is Kynar so important when coating your house? To be both functional and decorative, metal must be coated with a finish that beautifies with color and doesn’t chalk; that won’t lose its color and sheen; that won’t pit, chip, or age before its time. No other coating system withstands the rigors of nature and time like thosebased on Kynar 500® resins. This high-performance fluoropolymer resin, with its extraordinary capability to retain color and gloss, keeps painted metal looking vibrant and appealing.