Arkema proudly offers Kynar 500? FSF? technology for use in superior performance metal roof coatings. Celebrating over fifty years of proven protection, Kynar? resin-based coatings provide protection against weathering, aging, and pollution on commercial, industrial and residential buildings worldwide. Arkema produces Kynar 500? FSF? PVDF resin using a patented fluorosurfactant-free (FSF?) process. No fluorosurfactant of any kind is used to manufacture Kynar 500? resin making it a key component of sustainable design.